NBI Elements

NBI Elements  > ITEM 1 - State Code: 2 - Digit FIPS only

Code             Description
01                  Alabama
02                  Alaska
04                  Arizona
05                  Arkansas
06                  California
08                  Colorado
09                  Connecticut
10                  Delaware
11                  District of Columbia
12                  Florida
13                  Georgia
15                  Hawaii
16                  Idaho
17                  Illinois
18                  Indiana
19                  Iowa
20                  Kansas
21                  Kentucky
22                  Louisiana
23                  Maine
24                  Maryland
25                  Massachusetts
26                  Michigan
27                  Minnesota
28                  Mississippi
29                  Missouri
30                  Montana
31                  Nebraska
32                  Nevada
33                  New Hampshire
34                  New Jersey
35                  New Mexico
36                  New York
37                  North Carolina
38                  North Dakota
39                  Ohio
40                  Oklahoma
41                  Oregon
42                  Pennsylvania
44                  Rhode Island
45                  South Carolina
46                  South Dakota
47                  Tennessee
48                  Texas
49                  Utah
50                  Vermont
51                  Virginia
53                  Washington
54                  West Virginia
55                  Wisconsin
56                  Wyoming
60                  American Samoa
66                  Guam
69                  Northern Marianas
72                  Puerto Rico
78                  Virgin Islands 

NBI Elements  > ITEM 2 - Highway Agency District

The highway agency district (State or Federal) in which the bridge is located represented by a 2-digit code.

NBI Elements  > ITEM 4 - Place Code

Cities, towns, townships, villages, and other census-designated places identified using the FIPS codes given 
in the current version of the Census of Population and Housing - Geographic Identification Code Scheme.

NBI Elements  > ITEM 5 - Inventory Route

The inventory route is a 9-digit code composed of 5 segments.
Length                Segment       Description
1 digit                  5A                  Record Type
1 digit                  5B                  Route Signing Prefix
1 digit                  5C                  Designated level of service
5 digit                  5D                  Route Number
1 digit                  5E                  Directional Suffix

NBI Elements  > ITEM 5A - Record Type

There are 2 types of NBI records: "ON" and "UNDER".
Code            Description
1                  Route carried "ON" the structure
2                  Single route goes "UNDER" the sturcture
A - Z             Multiple routes go "UNDER" the structure

99                 Miscoded data

NBI Elements  > ITEM 5B - Record Signing Prefix

Code            Description
1                  Interstate highway
2                  U.S. numbered highway
3                  State highway
4                  County highway
5                  City street
6                  Federal lands road
7                  State lands road
8                  Other

99                 Miscoded data

NBI Elements  > ITEM 5C - Designated Level of Service

Code            Description
0                  None of the below
1                  Mainline
2                  Alternate
3                  Bypass
4                  Spur
6                  Business
7                  Ramp, Wye, Connector, etc.
8                  Service and/or unclassified frontage road

99                 Miscoded data

NBI Elements  > ITEM 5D - Route Number

The route number of inventory route in 5 digits, right justified with leading zeros.

NBI Elements  > ITEM 5E - Directional Suffix

Code            Description
0                  N/A
1                  North
2                  East
3                  South
4                  West

99                 Miscoded data

NBI Elements  > ITEM 6A - Features Intersected / ITEM 6B - Critical Facility Indicator

These items contain the description of the features intersected by the structure and a critical facility indicator( no longer coded ).

NBI Elements  > ITEM 7 - Facility Carried by Structure

The facility being carried by the structure.  In all situations this item describes the use "on" the structure.

NBI Elements  > ITEM 8 - Structure Number

A 15 digit structure number unique for each bridge within the state.

NBI Elements  >  ITEM 9 - Location

A narrative description of the bridge location.

NBI Elements  >  ITEM 10 - Inventory Route, Minimum Vertical Clearance

The minimum vertical clearance over the inventory route identified in Item 5, whether the route is "on" the structure 
or "under" the structure.  Measured in meters.

NBI Elements  >  ITEM 11 - Kilometerpoint

The linear referencing system(LRS) kilometerpoint is used to establish the location of the bridge on the 
Base Highway Network(Item 12).

NBI Elements  >  ITEM 12 - Base Highway Network

The Base Highway Network includes the through lane(mainline) portions of the NHS, rural/urban principal arterial system
and rural minor arterial system.  Ramps, frontage roads and other roadways are not included in the Base Network.
Code            Description
0                  Inventory route is not on the Base Network
1                  Inventory route is on the Base Network

99                 Miscoded data

NBI Elements  >  ITEMS 13A, 13B - LRS Inventory Route, Subroute Number

If Item 12 - Base Highway Network has been coded 1, the information to be recorded for this item is inventory route for 
the State's linear referencing system(LRS).  If Item 12 has been coded 0, this entire item is left blank.

NBI Elements  >  ITEM 19 - Bypass, Detour Length

The actual length to the nearest kilometer of the detour length.  It is the total additional travel for a vehicle
which would result from closing of the bridge.

NBI Elements  >  ITEM 20 - Toll

Code            Description
1                  Toll bridge.  Tolls are paid specifically to use the structure.
2                  On toll road.  The structure carries a toll road, i.e. tolls are paid to the facility, which includes
                    both the highway and the structure.
3                  On free road.  The structure is toll-free and carries a toll-free highway.
4                  On Interstate toll segment under Secretarial Agreement.  Structure functions as a part of 
                    the toll segment.
5                  Toll bridge is a segment under Secretarial Agreement.  Structure is  seperate agreement 
                    from highway segment.
                    
99                 Miscoded data

NBI Elements  > ITEMS 21, 22 - Maintenance Responsibility / Owner

Code            Description
01                 State Highway Agency
02                 County Highway Agency
03                 Town or Township Highway Agency
04                 City or Municipal Highway Agency
11                 State Park, Forest, or Reservation Agency
12                 Local Park, Forest, or Reservation Agency
21                 Other State Agencies
25                 Other Local Agencies
26                 Private (other than railroad)
27                 Railroad 31 State Toll Authority
32                 Local Toll Authority
60                 Other Federal Agencies (not listed below)
61                 Indian Tribal Government
62                 Bureau of Indian Affairs
63                 Bureau of Fish and Wildlife
64                 U.S. Forest Service
66                 National Park Service
67                 Tennessee Valley Authority
68                 Bureau of Land Management
69                 Bureau of Reclamation
70                 Corps of Engineers (Civil)
71                 Corps of Engineers (Military)
72                 Air Force
73                 Navy/Marines
74                 Army
75                 NASA
76                 Metropolitan Washington Airports Service
80                 Unknown

99                 Miscoded data

NBI Elements  > ITEM 26 - Functional Classification of Inventory Route

Code            Description
         Rural      
01                  Principal Arterial - Interstate
02                  Principal Arterial - Other
06                  Minor Arterial
07                  Major Collector
08                  Minor Collector
09                   Local 
         Urban      
11                  Principal Arterial - Interstate
12                  Principal Arterial - Other Freeways or Expressways
14                  Other Principal Arterial
16                  Minor Arterial
17                  Collector
19                  Local

99                  Miscoded data

NBI Elements  > ITEM 27 - Year Built

Year of construction of the structure.

NBI Elements  > ITEMS 28A, 28B - Lanes On and Under the Structure

Number of lanes being carried by the structure and being crossed over by the structure.

NBI Elements  > ITEM 29 - Average Daily Traffic

Average daily traffic volume for the inventory route identified in Item 5.

NBI Elements  > ITEM 30 - Year of Average Daily Traffic

Year represented by the ADT(Item 29).

NBI Elements  > ITEM 31 - Design Load

Code            Metric / English Description
1                  M 9 / H 10
2                  M 13.5 / H 15
3                  MS 13.5 / HS 15
4                  M 18 / H 20
5                  MS 18 / HS 20
6                  MS 18+Mod / HS 20+Mod
7                  Pedestrian
8                  Railroad
9                  MS 22.5 / HS 25
0                  Other or Unknown

99                 Miscoded data

NBI Elements  > ITEM 32 - Approach Roadway Width

Normal width of usable roadway approaching the structure measured in meters.

NBI Elements  > ITEM 33 - Bridge Median

Code            Description
0                  No median
1                  Open median
2                  Closed median(no barriers)
3                  Closed median with non-mountable barriers

99                 Miscoded data

NBI Elements  > ITEM 34 - Skew

The skew angle is the angle between the centerline of a pier and a line normal to the roadway centerline.
Major variation in skews of substructure units is indicated with 99.

NBI Elements  > ITEM 35 - Structure Flared

Flared = width of structure varies.
Code            Description
0                  No flare
1                  Yes, flared

99                 Miscoded data

NBI Elements  > ITEM 36 - Traffic Safety Features

Bridge inspection shall include the recording of information on the following traffic safety features 
so that the evaluation of their adequacy can be made.
Segment       Description
36A               Bridge railings
36B               Transitions
36C               Approach guardrail
36D               Approach guardrail ends

The reporting of these features shall be as follows:
Code            Description
0                  Inspected feature does not meet currently acceptable stds. or a safety feature is required and none is provided.*
1                  Inpected peature meets currently acceptable standards.*
N                  Not applicable or a safety feature is not required.*

99                 Miscoded data

*  For structures on the NHS, national standards are set by regulation. For those not on the NHS, it shall be 
   the responsibility of the highway agency (state, county, local or federal) to set standards.

NBI Elements  > ITEM 37 - Historical Significance

Code            Description
1                  Bridge is on the National Register of Historic Places(NRHP).
2                  Bridge is eligible for the NRHP.
3                  Bridge is possibly eligible for the NRHP(requires further investigation before determination can be made)
                    or bridge is on a State or local historic register.
4                  Historical significance is not determinable at this time.
5                  Bridge is not eligible for the NRHP.

99                 Miscoded data

NBI Elements  > ITEM 38 - Navigation Control

Code            Description
N                  Not applicable, no waterway.
0                  No navigation control on waterway(bridge permit not required).
1                  Navigation control on waterway(bridge permit required).

99                 Miscoded data

NBI Elements  > ITEM 39 - Navigation Vertical Clearance

If Item 38 - Navigation Control has been coded 1, clearance is the minimum vertical clearance imposed at the site as 
measured above a datum that is specified on a navigation permit issued by a control agency. Measured in meters.

NBI Elements  > ITEM 40 - Navigation Horizontal Clearance

If Item 38 - Navigation Control has been coded 1, clearance is the horizontal clearance imposed at the site that is shown
on the navigation permit. Measured in meters.

NBI Elements  > ITEM 41 - Structure Open, Posted or Closed to Traffic

Code            Description
A                  Open, no restriction
B                  Open, posting recommended but not legally implemented (all signs not in place or not correctly implemented)
D                  Open, would be posted or closed except for temporary shoring, etc. to allow for unrestricted traffic
E                  Open, temporary structure in place to carry legal loads while original structure is closed and awaiting
                    replacement or rehabilitation
G                  New structure not yet open to traffic
K                  Bridge closed to all traffic
P                  Posted for load (may include other restrictions such a temporary bridges which are load posted)
R                  Posted for other load-capacity restriction (speed, number of vehicles on bridge, etc.)

99                 Miscoded data

NBI Elements  > ITEMS 42A, 42B - Type of Service On / Under bridge

Type of Service On Bridge
Code            Description
1                  Highway
2                  Railroad
3                  Pedestrian-bicycle
4                  Highway-railroad
5                  Highway-pedestrian
6                  Overpass structure at an interchange or second level of a multilevel interchange
7                  Third level (Interchange)
8                  Fourth level (Interchange)
9                  Building of plaza
0                  Other

99                 Miscoded data

Type of Service under Bridge
Code            Description
1                  Highway, with or without pedestrian
2                  Railroad
3                  Pedestrian-bicycle
4                  Highway-railroad
5                  Waterway
6                  Highway-waterway
7                  Railroad-waterway
8                  Highway-waterway-railroad
9                  Relief for waterway
0                  Other

99                 Miscoded data

NBI Elements  > ITEMS 43A, 44A - Kind of material, Main / Approach

Code            Description
1                  Concrete
2                  Concrete continuous
3                  Steel
4                  Steel continuous
5                  Prestressed concrete *
6                  Prestressed concrete continuous *
7                  Wood or timber
8                  Masonry
9                  Aluminum, Wrought Iron or Cast Iron
0**                Other

99                 Miscoded data

* Post-tensioned concrete coded as prestressed concrete
** Not applicable for Item 44

NBI Elements  > ITEMS 43B, 44B - Type of Design, Main / Approach

Code            Description
01                  Slab
02                  Stringer/Multi-beam or girder
03                  Girder and floorbeam system
04                  Tee beam
05                  Box beam or girders - Multiple
06                  Box Beam or girders - Single or Spread
07                  Frame
08                  Orthotropic
09                  Truss - Deck
10                  Truss - Thru
11                  Arch - Deck
12                  Arch - Thru
13                  Suspension
14                  Stayed girder
15                  Movable - Lift
16                  Movable - Bascule
17                  Movable - Swing
18                  Tunnel
19                  Culvert
20*                 Mixed types
21                  Segmental box girder
22                  Channel beam
00**                Other

99                 Miscoded data

*  Applicable to only approach spans - Item 44.
** Not applicable for Item 44

NBI Elements  > ITEM 45 - Number of Spans in Main Unit

Number of spans in the main or major unit.

NBI Elements  > ITEM 46 - Number of Approach Spans

Number of spans in the approach spans to the major bridge, or the number of spans of material different 
from that of the major bridge.

NBI Elements  > ITEM 47 - Inventory Route, Total Horizontal Clearance

The total horizontal clearance for the inventory route identified in Item 5 measured in meters. It is the available
clearance measured between the restrictive features -- curbs, rails, walls, piers or other structural features limiting the 
roadway (surface and shoulders).  When the restriction is 100 meters or greater, code could be 999.

NBI Elements  > ITEM 48 - Length of Maximum Span

The length of maximum span.  It shall be noted whether the measurement is center of bearing points or clear open distance between
piers, bents or abutments.  The measurement shall be along the centerline of the bridge.  Measured in meters.

NBI Elements  > ITEM 49 - Structure Length

The length of the structure measured in meters.  This shall be the length of roadway which is supported on the bridge structure. 
The length is measured back to back of backwalls of abutments or from paving notch to paving notch.  Culvert lengths are measured along 
the center line of roadway regardless of their depth below grade. Measurement is made between inside faces of exterior walls.  Tunnel 
length is measured along the centerline of the roadway.

NBI Elements  > ITEMS 50A, 50B - Curb or Sidewalk Widths (Left / Right)

The widths of the left and right curbs or sidewalks measured in meters.  "Left" and "Right" is determined on the basis of 
direction of the inventory.

NBI Elements  > ITEM 51 - Bridge Roadway Width, Curb-to-Curb

The most restrictive minimum distance between curbs or rails on the structure roadway measured in meters.

NBI Elements  > ITEM 52 - Deck Width, Out-to-Out

The out-to-out width measured in meters.

NBI Elements  > ITEM 53 - Minimum Vertical Clearance Over Bridge Roadway

The actual minimum vertical clearance over the bridge roadway, including shoulders, to any superstructure restriction, 
measured in meters.  When no superstructure restriction exists above the bridge roadway, or when a restriction
is 30 meters or greater, indicated as 99.99.

NBI Elements  > ITEM 54A - Minimum Vertical Underclearance - Reference feature

The reference feature from which the clearance measurement is taken:
Code            Description
H                  Highway beneath structure
R                  Railroad beneath structure
N                  Feature not a highway or railroad

99                 Miscoded data

NBI Elements  > ITEM 54B - Minimum Vertical Underclearance

The minimum vertical clearance from the roadway(travel lanes only) or railroad track beneath the structure to the 
underside of the superstructure.  Measured in meters.

NBI Elements  > ITEM 55A - Minimum Lateral Underclearance - Reference feature

The reference feature from which the clearance measurement is taken:
Code            Description
H                  Highway beneath structure
R                  Railroad beneath structure
N                  Feature not a highway or railroad

99                 Miscoded data

NBI Elements  > ITEM 55B - Minimum Lateral Underclearance on Right

The minimum lateral underclearance on the right measured in meters.

NBI Elements  > ITEM 56 - Minimum Lateral Underclearance on Left

The minimum lateral underclearance on the left measured in meters.

NBI Elements  > ITEMS 58, 59, 60 - Condition ratings: Deck, Superstructure, Substructure

Code            Description
N                  NOT APPLICABLE

9                  EXCELLENT CONDITION

8                  VERY GOOD CONDITION - no problems noted.

7                  GOOD CONDITION - some minor problems.

6                  SATISFACTORY CONDITION - structural elements show some minor deterioration.

5                  FAIR CONDITION - all primary structural elements are sound but may have minor section loss, cracking, 
                    spalling or scour.

4                  POOR CONDITION - advanced section loss, deterioration, spalling or scour.

3                  SERIOUS CONDITION - loss of section, deterioration of primary structural elements.  Fatigue cracks 
                    in steel or shear cracks in concrete may be present.

2                  CRITICAL CONDITION - advanced deterioration of primary structural elements.  Fatigue cracks in steel 
                    or shear cracks in concrete may be present or scour may have removed substructure support.  Unless 
                    closely monitored it may be necessary to close the bridge until corrective action is taken.

1                  "IMMINANT" FAILURE CONDITION - major deterioration or section loss present in critical sructural 
                    components or obvious vertical or horizontal movement affecting structure stability.  Bridge is 
                    closed to traffic but corrective action may put it back in light service.

0                  FAILED CONDITION - out of service; beyond corrective action.

99                 Miscoded data

NBI Elements  > ITEM 61 - Channel and Channel Protection

Code            Description
N                  Not applicable.

9                  There are no noticeable or noteworthy deficiencies which affect the condition of the channel.

8                  Banks are protected or well vegetated.  River control devices such as spur dikes and embankment protection 
                    are not required or are in a stable condition.

7                  Bank protection is in need of minor repairs.  River control devices and embankment protection have a little 
                    minor damage.  Banks and/or channel have minor amounts of drift.

6                  Bank is beginning to slump.  River control devices and embankment protection have widespread minor damage.  
                    There is minor stream bed movement evident.  Debris is restricting the channel slightly.

5                  Bank protection is being eroded.  River control devices and/or embankment have major damage.  Trees and 
                    brush restrict the channel.

4                  Bank and embankment protection is severely undermined.  River control devices have severe damage. 
                    Large deposits of debris are in the channel.

3                  Bank protection has failed.  River control devices have been destroyed.  Stream bed aggradation, degradation 
                    or lateral movement has changed the channel to now threaten the bridge and/or approach roadway.

2                  The channel has changed to the extent the bridge is near a state of collapse.

1                  Bridge closed because of channel failure.  Corrective action may put back in light service.

0                  Bridge closed because of channel failure.  Replacement necessary.

99                 Miscoded data

NBI Elements  > ITEM 62 - Culverts

Code            Description
N                  Not applicable.  Used if structure is not a culvert.

9                  No defeciencies

8                  No noticeable or noteworthy deficiencies which affect the condition of the culvert.  Insignificant scrape 
                    marks caused by drift.

7                  Shrinkage cracks, light scaling and insignificant spalling which does not expose reinforcing steel.  Insignificant
                    damage caused by drift with no misalignment and not requiring corrective action.  Some minor scouring has  
                    occured near curtain walls, wingwalls or pipes.  Metal culverts have a smooth symmetrical curvature with 
                    superficial corrosion and no pitting.

6                  Deterioration or initial disintegration, minor chloride contamination, cracking with some leaching, or spalls
                    on concrete or masonry walls and slabs.  Local minor scouring at curtain walls, wingwalls or pipes.  Metal culverts
                    have a smooth curvature, non-symmetrical shape, significant corrosion or moderate pitting.

5                  Moderate to major deterioration or disintegration, extensive cracking and leaching or spalls on concrete
                    or masonry walls and slabs.  Minor settlement or misalignment.  Noticeable scouring or erosion at curtain walls,
                    wingwalls or pipes.  Metal culverts have significant distortion and deflection in one section, significant corrosion
                    or deep pitting.

4                  Large spalls, heavy scaling, wide cracks, considerable efflorescence or opened construction joint permitting loss of
                    backfill.  Considerable settlement or misalignment.  Considerable scouring or erosion at curtain walls, wingwalls or
                    pipes.  Metal culverts have significant distortion and deflection throughout, extensive corrosion or deep pitting.

3                  Any condition described in Code 4 but which is excessive in scope.  Severe movement or differential setlement of the 
                    segments or loss of fill.  Holes may exist in walls or slabs.  Integral wingwalls nearly severed from culvert.  Severe
                    scour or erosion at curtain walls, wingwalls or pipes.  Metal culverts have extreme distortion and delection in one 
                    section, extensive corrosion, or deep pitting with scattered perforations.

2                  Integral wingwalls collapsed, severe settlement of roadway due to loss of fill.  Section of culvert may have failed and 
                    can no longer support embankment.  Complete undrmining at curtain walls and pipes.  Corrective action required to 
                    maintain traffic.  Metal culverts have extreme distortion and deflection and deflection throughout with extensive 
                    perforations due to corrosion.

1                  Bridge closed.  Corrective action may put back in light service.

0                  Bridge closed.  Replacement necessary.

99                 Miscoded data

NBI Elements  > ITEMS 63, 65 - Method Used to Determine: Operating Rating / Inventory Rating

Code            Description
1                  Load Factor(LF)
2                  Allowable Stress(AS)
3                  Load and Resistance Factor(LRFR)
4                  Load Testing
5                  No rating analysis performed

99                 Miscoded data

NBI Elements  > ITEM 64 - Operating Rating

This capacity rating referred to as the operating rating, will result in the  absolute maximum permissible load level to which
the structure may be subjected for the vehicle type used in the rating.  Represents the total mass of the entire vehicle 
measured in metric tons.  If the bridge will not carry a minimum of 2.7 metric tons of live load, the operating rating 
is 0 metric tons.

NBI Elements  > ITEM 66 - Inventory Rating

This capacity rating referred to as the inventory rating, will result in a load level which can safely utilize an existing 
structure for an indefinite period of time.  Coded as '999' for a structure under sufficient fill such that, according to
AASHTO design, the live load is insignificant in the structure load capacity.

NBI Elements  > ITEMS 67, 68, 69, 71, 72 - Appraisal ratings

- Structural Evaluation
- Deck Geometry
- Underclearances, Vertical and Horizontal
- Water Adequacy
- Approach Roadway Alignment

Code            Description
N                  N/A
9                  Superior to present desirable criteria
8                  Equal to present desirable criteria
7                  Better than present minimum criteria
6                  Equal to present minimum criteria
5                  Somewhat better than minimum adequacy to tolerate being left in place as is
4                  Meets minimum tolerable limits to be left in place as is
3                  Basically intolerable requiring high priority of corrrective action
2                  Basically intolerable requiring high priority of replacement
1                  This value of rating code not used
0                  Bridge closed

99                 Miscoded data

NBI Elements  > ITEMS 70 - Bridge Posting

Code            Description
5                  Equal to or above legal loads
4                  00.1  -  09.9 % below
3                  10.0  -  19.9 % below
2                  20.0  -  29.9 % below
1                  30.0  -  39.9 % below
0                        >  39.9% below

99                 Miscoded data

NBI Elements  > ITEM 75A - Type of Work

Code            Description
31                 Replacement of bridge or other structure because of substandard load carrying 
                    capacity or substantial bridge roadway geometry.

32                 Replacement of bridge or other structure because of relocation of road.

33                 Widening of existing bridge or other major structure without deck rehabilitation
                    or replacement; includes culvert lengthening.

34                 Widening of existing bridge with deck rehabilitation or replacement.

35                 Bridge rehabilitation because of general structure deterioration or inadequate strength.

36                 Bridge deck rehabilitation with only incidental widening.

37                 Bridge deck replacement with only incidental widening.

38                 Other structural work, including hydraulic replacements.

99                 Miscoded data

NBI Elements  > ITEM 75B - Work Done By

Code            Description
1                  Work to be done by contract
2                  Work to be done by owner's forces

99                 Miscoded data

NBI Elements  > ITEM 76 - Length of Structure Improvement

This is the length of the proposed bridge improvement measured in meters.

NBI Elements  > ITEM 90 - Inspection Date

This is the month(2-digits) and year(4-digits) of the last routine inspection of the structure performed.

NBI Elements  > ITEM 91 - Designated Inspection Frequency

This is the number of months between designated inspections of the structure.

NBI Elements  > ITEMS 92A, 92B, 92C - Critical Feature Inspection

- Fracture Critical Details
- Underwater Inspection
- Other Special Inspection

1st digit
Code            Description
Y                  Special inspection or emphasis needed
N                  Not needed

2nd and 3rd digit
2 - digit number to indicate the number of months between inspections only if the first digit is coded 'Y'.

NBI Elements  > ITEMS 93A, 93B, 93C - Critical Feature Inspection Date

If the first digit of Item 92 is coded 'Y' then the first 2 - digits represent the month and last 2 - digits represent
the year that the last inspection of the denoted critical feature was performed.

NBI Elements  > ITEM 94 - Bridge Improvement Cost

Estimated cost of the proposed bridge or major structure improvements in thousands of dollars.  This cost shall 
include only bridge construction costs, excluding roadway, right of way, detour, demolition, prelimnary engineering, etc.

NBI Elements  > ITEM 95 - Roadway Improvement Cost

Estimated cost of the proposed roadway improvement in thousands of dollars.  This shall include only roadway 
construction costs, excluding bridge, right-of-way, detour, extensive roadway realignment costs, preliminary 
engineering, etc.

NBI Elements  > ITEM 96 - Total Project Cost

Estimated total project costs associated with the proposed bridge improvement project in thousands of 
dollars, including incidental costs not included in Items 94 and 95.  The total project cost will therefore
be greater than the sum of Items 94 and 95.

NBI Elements  > ITEM 97 - Year of Improvement Cost Estimate

The 4 - digit year that the costs of work estimated in Items 94, 95 and 96 were based upon.

NBI Elements  > ITEM 98 - Border Bridge

This item indicates structures crossing borders of States.
Segment            Description
98A                  Neighboring State Code[ 3 digits ]
98B                  Percent Responsibility*[ 2 digits ] 
* - Percentage of total deck area of the existing bridge that the neighboring State is responsible for funding.

If the structure is not on a border, left blank.

NBI Elements  > ITEM 99 - Border Bridge Structure Number

This item indicates neighboring State's 15-Digit NBI structure number for any structure noted in Item 98.
Blank if Item 98 is blank.

NBI Elements  > ITEM 100 - STRAHNET Highway Designation

Code            Description
1                  The inventory route is not a STRAHNET route.
2                  The inventory route is on a Interstate STRAHNET route.
3                  The inventory route is on a Non-Interstate STRAHNET route.
4                  The inventory route is on a STRAHNET connector route.

99                 Miscoded data

NBI Elements  > ITEM 101 - Parallel Structure Designation

Code            Description
R                  The right structure of parallel bridges carrying the roadway in the direction of the inventory.
                    ( For a STRAHNET highway, this is west to east and south to north. )
L                  The left structure of parallel bridges.  This structure carries traffic in the opposite direction.
N                  No parallel structure exists.

99                 Miscoded data

NBI Elements  > ITEM 102 - Direction of Traffic

Code            Description
0                  Highway traffic not carried
1                  1 - way traffic
2                  2 - way traffic
3                  One lane bridge for 2 - way traffic

99                 Miscoded data

NBI Elements  > ITEM 103 - Temporary Structure Designation

Code            Description
T                  Temporary structure(s) or conditions exist.
99                 Miscoded data

Blank if not applicable.

NBI Elements  > ITEM 104 - Highway System of the Inventory Route

Code            Description
0                  Inventory Route is not on the NHS.
1                  Inventory Route is on the NHS.

99                 Miscoded data

NBI Elements  > ITEM 105 - Federal Lands Highway

Code            Description
0                  N/A
1                  Indian Reservation Road (IRR)
2                  Forest Highway (FH)
3                  Land Management Highway System (LMHS)
4                  Both IRR and FH
5                  Both IRR and LMHS
6                  Both FH and LMHS
9                  Combined IRR, FH and LMHS

99                 Miscoded data

NBI Elements  > ITEM 106 - Year Reconstructed

4 - digit year of most recent reconstruction of the structure.  If there has been no reconstruction, year is 0.

NBI Elements  > ITEM 107 - Deck Structure Type

Code            Description
1                  Concrete Cast-in-Place
2                  Concrete Precast Panels
3                  Open Grating
4                  Closed Grating
5                  Steel plate (includes orthotropic)
6                  Corrugated Steel
7                  Aluminum
8                  Wood or Timber
9                  Other
N                  Not applicable

99                 Miscoded data

NBI Elements  > ITEM 108 - Wearing Surface/Protective System

Information on the wearing surface and protective system of the bridge deck is composed of 3 segments.
Length                Segment           Description
1 digit                  108A                  Type of Wearing Surface
1 digit                  108B                  Type of Membrane
1 digit                  108C                  Deck Protection

NBI Elements  > ITEM 108A - Type of Wearing Surface

Code            Description
1                  Monolithic Concrete (concurrently placed with structural deck)
2                  Integral Concrete (separate non-modified layer of concrete added to structural deck)
3                  Latex Concrete or similar additive
4                  Low slump Concrete
5                  Epoxy Overlay
6                  Bituminous
7                  Wood or Timber
8                  Gravel
9                  Other
0                  None (no additional concrete thickness or wearing surface is included in the bridge deck)
N                  Not applicable (applies only to structures with no deck)

99                 Miscoded data

NBI Elements  > ITEM 108B - Type of Membrane

Code            Description
1                  Built-up
2                  Preformed Fabric
3                  Epoxy
8                  Unknown
9                  Other
0                  None
N                  Not applicable (applies only to structures with no deck)

99                 Miscoded data

NBI Elements  > ITEM 108C - Deck Protection

Code            Description
1                  Epoxy Coated Reinforcing
2                  Galvanized Reinforcing
3                  Other Coated Reinforcing
4                  Cathodic Protected
6                  Polymer Impregnated
7                  Internally Sealed
8                  Unknown
9                  Other
0                  None
N                  Not applicable (applies only to structures with no deck)

99                 Miscoded data

NBI Elements  > ITEM 109 - Average Daily Truck Traffic

The percentage that shows the percentage of Item 29 - Average Daily Traffic that is truck Trafic.

NBI Elements  > ITEM 110 - Designated National Network

Code            Description
0                  The inventory route is not part of the national network for trucks.
1                  The inventory route is part of the national network for trucks.

99                 Miscoded data

NBI Elements  > ITEM 111 - Pier or Abutment Protection

Code            Description
1                  Navigation protection not required
2                  In place and functioning
3                  In place but in a deteriorated condition
4                  In place but re-evaluation of design suggested
5                  None present but re-evaluation suggested

99                 Miscoded data

NBI Elements  > ITEM 112 - NBIS Bridge Length

Does this structure meet or exceed the minimum length specified to be
designated as a bridge for National Bridge Inspection Standards purposes?
Code            Description
Y                  Yes
N                  No

99                 Miscoded data

NBI Elements  > ITEM 113 - Scour Critical Bridges

Code            Description
N                  Bridge not over waterway.

U                  Bridge with "unknown" foundation that has not been evaluated for scour. Until risk can be 
                    determined, a plan of action should be developed and implemented to reduce the risk to 
                    users from abridge failure during and immediately after a flood event (see HEC 23).
                    
T                  Bridge over "tidal" waters that has not been evaluated for scour, but considered low risk. 
                    Bridge will be monitored with regular inspection cycle and with appropriate underwater 
                    inspections until an evaluation is performed ("Unknown" foundations in "tidal" waters 
                    should be coded U.)
                    
9                  Bridge foundations (including piles) on dry land well above flood water elevations.

8                  Bridge foundations determined to be stable for the assessed or calculated scour condition. 
                    Scour is determined to be above top of footing (Example A) by assessment (i.e., bridge 
                    foundations are on rock formations that have been determined to resist scour within the 
                    service life of the bridge4), by calculation or by installation of properly designed 
                    countermeasures (see HEC 23).
                    
7                  Countermeasures have been installed to mitigate an existing problem with scour and to 
                    reduce the risk of bridge failure during a flood event. Instructions contained in a plan 
                    of action have been implemented to reduce the risk to users from a bridge failure during 
                    or immediately after a flood event.
                    
6                  Scour calculation/evaluation has not been made. (Use only to describe case where bridge 
                    has not yet been evaluated for scour potential.)
                    
5                  Bridge foundations determined to be stable for assessed or calculated scour condition. 
                    Scour is determined to be within the limits of footing or piles (Example B) by assessment 
                    (i.e.,bridge foundations are on rock formations that have been determined to resist scour 
                    within the service life of the bridge), by calculations or by installation of properly 
                    designed countermeasures (see HEC 23).
                    
4                  Bridge foundations determined to be stable for assessed or calculated scour conditions; 
                    field review indicates action is required to protect exposed foundations (see HEC 23).
                    
3                  Bridge is scour critical; bridge foundations determined to be unstable for assessed or 
                    calculated scour conditions:
                       - Scour within limits of footing or piles. (Example B)
                       - Scour below spread-footing base or pile tips. (Example C)
                       
2                  Bridge is scour critical; field review indicates that extensive scour has occurred at 
                    bridge foundations, which are determined to be unstable by:
                       - a comparison of calculated scour and observed scour during the bridge inspection, or
                       - an engineering evaluation of the observed scour condition reported by the bridge 
                         inspector in Item 60.

1                  Bridge is scour critical; field review indicates that failure of piers/abutments is 
                    imminent. Bridge is closed to traffic. Failure is imminent based on:
                       - a comparison of calculated and observed scour during the bridge inspection, or
                       - an engineering evaluation of the observed scour condition reported by the bridge 
                         inspector in Item 60.

0                  Bridge is scour critical. Bridge has failed and is closed to traffic.

99                 Miscoded data

NBI Elements  > ITEM 114 - Future Average Daily Traffic

The forecasted average daily traffic(ADT) for the inventory route identfied in Item 5.

NBI Elements  > ITEM 115 - Year of Future Average Daily Traffic

Year represented by the future ADT in Item 114.

NBI Elements  > ITEM 116 - Minimum Navigation Vertical Clearance, Vertical Lift Bridge

The minimum vertical clearance imposed at the site as measured above a datum that is specified on a navigation
permit issued by a control agency.  Measured in meters.

NBI Elements  > Deck area

This is Deck width( ITEM 52 ) times Structure length( ITEM 49 ) or ITEM_52 x ITEM_49.

NBI Elements  > FIPS

The first 2 digits are the Federal Information Processing Standards (FIPS) code for Item 1, and the last 3 digits are the 
code for Item 3.

NBI Elements  > Status

Code            Description
0                  Not defecient
1                  Structurally defecient
2                  Functionally obsolete
N                  Not applicable

NBI Elements  > Sufficiency rating

The sufficiency is a method of evaluating highway bridge data by calculating four separate factors to obtain
a numeric value which is indicative of bridge sufficiency to remain in service.  The result of this method is
a percentage in which 100 percent would represent a entirely sufficient bridge and zero percent would represent
an entirely insufficient or deficient bridge.


NBI Elements  > Structurally defecient(SD) & Functionally obsolete(FO) Criteria

Below are the definitions for SD criteria and FO criteria in this application. It must be noted 
that, based on the criteria used, a bridge could be both structurally deficient and functionally obsolete.

The status field however provides the option of running a query in which a bridge designated as functionally obsolete is 
not structurally deficient. In other words functionally obsolete bridges are exclusive of structurally deficient bridges. 
Also, the status field definition of bridge deficiencies is limited only to those bridges which are 10 years or 
older and are more than 20 feet in length.

Definition of SD criteria 
SD(Structurally deficient) criteria are defined as bridges that meet at least one of the following qualifications:

1.      ITEM 58  coded 0, 1, 2, 3 or 4;  or
2.      ITEM 59  coded 0, 1, 2, 3 or 4;  or
3.      ITEM 60  coded  0, 1, 2, 3 or 4; or
4.      ITEM 62 coded 0, 1, 2, 3 or 4; and the last two digits of ITEM 43 are coded 19; or
5.      ITEM 67 coded 0, 1 or 2; or
6.      ITEM 71 coded 0, 1 or 2 and the last digit of ITEM 42 coded 0, 5, 6, 7, 8 or 9.

Definition of FO criteria 
FO(Functionally Obsolete) criteria are defined as bridges that meet at least one of the following qualifications:

1.      ITEM 68 coded 0, 1, 2 or 3; or
2.      ITEM 69 coded 0, 1, 2 or 3 and the last digit of ITEM 42 coded 0, 1, 2, 4, 6, 7 or 8; or
3.      ITEM 72 coded 0, 1, 2 or 3; or
4.      ITEM 67 coded 3; or
5.      ITEM 71 coded 3 and the last digit of ITEM 42 coded 0, 5, 6, 7, 8 or 9.