U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000


Skip to content U.S. Department of Transportation/Federal Highway AdministrationU.S. Department of Transportation/Federal Highway Administration

Bridges & Structures

NBI ASCII Files

NBI Record Format

With the conversion to metric and the addition of new items it is required to expand the size of the NBI record to 432 characters. The following format will be use to submit data to the FHWA.

ITEM NOITEM NAMEITEM POSITIONITEM LENGTH/TYPE
1State Code1 - 33/N
8Structure Number4 - 1815/AN
5Inventory Route19 - 279/AN
5ARecord Type19 1/AN
5BRoute Signing Prefix201/N
5CDesignated Level of Service211/N
5DRoute Number22 - 265/AN
5EDirectional Suffix27 1/N
2Highway Agency District28 - 292/AN
3County (Parish) Code30 - 323/N
4Place Code33 - 375/N
6Features Intersected38 - 6225/AN
6AFeatures Intersected38 - 6124/AN
6BCritical Facility Indicator621/AN
7Facility Carried By Structure63 - 8018/AN
9Location81 - 10525/AN
10Inventory Rte, Min Vert Clearance106 - 1094/N
11Kilometerpoint110 - 1167/N
12Base Highway Network1171/N
13Inventory Route, Subroute Number118 - 12912/AN
13ALRS Inventory Route118 - 12710/AN
13BSubroute Number128 - 1292/N
16Latitude130 - 1378/N
17Longitude138 - 1469/N
19Bypass/Detour Length147 - 1493/N
20Toll1501/N
21Maintenance Responsibility151 - 1522/N
22Owner153 - 1542/N
26Functional Class Of Inventory Rte.155 - 1562/N
27Year Built157 - 1604/N
28Lanes On/Under Structure161 - 1644/N
28ALanes On Structure161 - 1622/N
28BLanes Under Structure163 - 1642/N
29Average Daily Traffic165 - 1706/N
30Year Of Average Daily Traffic171 - 1744/N
31Design Load1751/N
32Approach Roadway Width176 - 1794/N
33Bridge Median1801/N
34Skew181 - 1822/N
35Structure Flared1831/N
36Traffic Safety Features184 - 1874/AN
36ABridge Railings1841/AN
36BTransitions1851/AN
36CApproach Guardrail1861/AN
36DApproach Guardrail Ends1871/AN
37Historical significance1881/N
38Navigation Control1891/AN
39Navigation Vertical Clearance190 - 1934/N
40Navigation Horizontal Clearance194 - 1985/N
41Structure Open/Posted/Closed1991/AN
42Type Of Service200 - 2012/N
42AType of Service On Bridge2001/N
42BType of Service Under Bridge2011/N
43Structure Type, Main202 - 2043/N
43AKind of Material/Design2021/N
43BType of Design/Construction203 - 2042/N
44Structure Type, Approach Spans205 - 2073/N
44AKind of Material/Design2051/N
44BType of Design/Construction206 - 2072/N
45Number Of Spans In Main Unit208 - 2103/N
46Number Of Approach Spans211 - 2144/N
47Inventory Rte Total Horz Clearance215 - 2173/N
48Length Of Maximum Span218 - 2225/N
49Structure Length223 - 2286/N
50Curb/Sidewalk Widths229 - 2346/N
50ALeft Curb/Sidewalk Width229 - 2313/N
50BRight Curb/Sidewalk Width232 - 2343/N
51Bridge Roadway Width Curb-To-Curb235 - 2384/N
52Deck Width, Out-To-Out239 - 2424/N
53Min Vert Clear Over Bridge Roadway243 - 2464/N
54Minimum Vertical Underclearance247 - 2515/AN
54AReference Feature2471/AN
54BMinimum Vertical Underclearance248 - 2514/N
55Min Lateral Underclear On Right252 - 2554/AN
55AReference Feature2521/AN
55BMinimum Lateral Underclearance253 - 2553/N
56Min Lateral Underclear On Left256 - 2583/N
58Deck2591/AN
59Superstructure2601/AN
60Substructure2611/AN
61Channel/Channel Protection2621/AN
62Culverts2631/AN
63Method Used To Determine Operating Rating2641/N
64Operating Rating265 - 2673/N
65Method Used To Determine Inventory Rating2681/N
66Inventory Rating269 - 2713/N
67Structural Evaluation2721/AN
68Deck Geometry2731/AN
69Underclear, Vertical & Horizontal2741/AN
70Bridge Posting2751/N
71Waterway Adequacy2761/AN
72Approach Roadway Alignment2771/AN
75Type of Work278 - 2803/N
75AType of Work Proposed278 - 2792/N
75BWork Done By2801/AN
76Length Of Structure Improvement281 - 2866/N
90Inspection Date287 - 2904/N
91Designated Inspection Frequency291 - 2922/N
92Critical Feature Inspection293 - 3019/AN
92AFracture Critical Details293 - 2953/AN
92BUnderwater Inspection296 - 2983/AN
92COther Special Inspection299 - 3013/AN
93Critical Feature Inspection Dates302 - 31312/AN
93AFracture Critical Details Date302 - 3054/AN
93BUnderwater Inspection Date306 - 3094/AN
93COther Special Inspection Date310 - 3134/AN
94Bridge Improvement Cost314 - 3196/N
95Roadway Improvement Cost320 - 3256/N
96Total Project Cost326 - 3316/N
97Year Of Improvement Cost Estimate332 - 3354/N
98Border Bridge336 - 3405/AN
98ANeighboring State Code336 - 3383/AN
98BPercent Responsibility339 - 3402/N
99Border Bridge Structure Number341 - 35515/AN
100STRAHNET Highway Designation3561/N
101Parallel Structure Designation3571/AN
102Direction Of Traffic3581/N
103Temporary Structure Designation3591/AN
104Highway System Of Inventory Route3601/N
105Federal Lands Highways3611/N
106Year Reconstructed362 - 3654/N
107Deck Structure Type3661/AN
108Wearing Surface/Protective System367 - 3693/AN
108AType of Wearing Surface3671/AN
108BType of Membrane3681/AN
108CDeck Protection3691/AN
109AVERAGE DAILY TRUCK TRAFFIC370 - 3712/N
110DESIGNATED NATIONAL NETWORK3721/N
111PIER/ABUTMENT PROTECTION3731/N
112NBIS BRIDGE LENGTH3741/AN
113SCOUR CRITICAL BRIDGES3751/AN
114FUTURE AVERAGE DAILY TRAFFIC376 - 3816/N
115YEAR OF FUTURE AVG DAILY TRAFFIC382 - 3854/N
116MINIMUM NAVIGATION VERTICAL CLEARANCE VERTICAL LIFT BRIDGE386 - 3894/N
 FEDERAL AGENCY INDICATOR391 
 Washington Headquarters Use392 - 426 
 STATUS with 10yr rule427 
n/aAsterisk Field in SR4281/AN
SRSUFFICIENCY RATING (select from last 4 positions only)429 - 4324/N
STATUS without 10yr rule. Field new in 2013 and future years433

Status field:

  • 1 = Structurally Deficient;
  • 2 = Functionally Obsolete;
  • 0 = Not Deficient;
  • N = Not Applicable

Note: The "10 Year Rule" excludes bridges built or reconstructed within the past 10 years of being assigned a deficiency status since they are not generally eligible for Highway Bridge Program funding. The Highway Bridge Program was not continued in MAP-21, however, funds are still available in the old program

Updated: 07/10/2014
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000