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


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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 445 characters. The following format will be used to submit data to the FHWA.

ITEM NO ITEM NAME ITEM POSITION ITEM LENGTH/TYPE
1 State Code 1 - 3 3/N
8 Structure Number 4 - 18 15/AN
5 Inventory Route 19 - 27 9/AN
5A Record Type 19 1/AN
5B Route Signing Prefix 20 1/N
5C Designated Level of Service 21 1/N
5D Route Number 22 - 26 5/AN
5E Directional Suffix 27 1/N
2 Highway Agency District 28 - 29 2/AN
3 County (Parish) Code 30 - 32 3/N
4 Place Code 33 - 37 5/N
6 Features Intersected 38 - 62 25/AN
6A Features Intersected 38 - 61 24/AN
6B Critical Facility Indicator 62 1/AN
7 Facility Carried By Structure 63 - 80 18/AN
9 Location 81 - 105 25/AN
10 Inventory Rte, Min Vert Clearance 106 - 109 4/N
11 Kilometerpoint 110 - 116 7/N
12 Base Highway Network 117 1/N
13 Inventory Route, Subroute Number 118 - 129 12/AN
13A LRS Inventory Route 118 - 127 10/AN
13B Subroute Number 128 - 129 2/N
16 Latitude 130 - 137 8/N
17 Longitude 138 - 146 9/N
19 Bypass/Detour Length 147 - 149 3/N
20 Toll 150 1/N
21 Maintenance Responsibility 151 - 152 2/N
22 Owner 153 - 154 2/N
26 Functional Class Of Inventory Rte. 155 - 156 2/N
27 Year Built 157 - 160 4/N
28 Lanes On/Under Structure 161 - 164 4/N
28A Lanes On Structure 161 - 162 2/N
28B Lanes Under Structure 163 - 164 2/N
29 Average Daily Traffic 165 - 170 6/N
30 Year Of Average Daily Traffic 171 - 174 4/N
31 Design Load 175 1/N
32 Approach Roadway Width 176 - 179 4/N
33 Bridge Median 180 1/N
34 Skew 181 - 182 2/N
35 Structure Flared 183 1/N
36 Traffic Safety Features 184 - 187 4/AN
36A Bridge Railings 184 1/AN
36B Transitions 185 1/AN
36C Approach Guardrail 186 1/AN
36D Approach Guardrail Ends 187 1/AN
37 Historical significance 188 1/N
38 Navigation Control 189 1/AN
39 Navigation Vertical Clearance 190 - 193 4/N
40 Navigation Horizontal Clearance 194 - 198 5/N
41 Structure Open/Posted/Closed 199 1/AN
42 Type Of Service 200 - 201 2/N
42A Type of Service On Bridge 200 1/N
42B Type of Service Under Bridge 201 1/N
43 Structure Type, Main 202 - 204 3/N
43A Kind of Material/Design 202 1/N
43B Type of Design/Construction 203 - 204 2/N
44 Structure Type, Approach Spans 205 - 207 3/N
44A Kind of Material/Design 205 1/N
44B Type of Design/Construction 206 - 207 2/N
45 Number Of Spans In Main Unit 208 - 210 3/N
46 Number Of Approach Spans 211 - 214 4/N
47 Inventory Rte Total Horz Clearance 215 - 217 3/N
48 Length Of Maximum Span 218 - 222 5/N
49 Structure Length 223 - 228 6/N
50 Curb/Sidewalk Widths 229 - 234 6/N
50A Left Curb/Sidewalk Width 229 - 231 3/N
50B Right Curb/Sidewalk Width 232 - 234 3/N
51 Bridge Roadway Width Curb-To-Curb 235 - 238 4/N
52 Deck Width, Out-To-Out 239 - 242 4/N
53 Min Vert Clear Over Bridge Roadway 243 - 246 4/N
54 Minimum Vertical Underclearance 247 - 251 5/AN
54A Reference Feature 247 1/AN
54B Minimum Vertical Underclearance 248 - 251 4/N
55 Min Lateral Underclear On Right 252 - 255 4/AN
55A Reference Feature 252 1/AN
55B Minimum Lateral Underclearance 253 - 255 3/N
56 Min Lateral Underclear On Left 256 - 258 3/N
58 Deck 259 1/AN
59 Superstructure 260 1/AN
60 Substructure 261 1/AN
61 Channel/Channel Protection 262 1/AN
62 Culverts 263 1/AN
63 Method Used To Determine Operating Rating 264 1/N
64 Operating Rating 265 - 267 3/N
65 Method Used To Determine Inventory Rating 268 1/N
66 Inventory Rating 269 - 271 3/N
67 Structural Evaluation 272 1/AN
68 Deck Geometry 273 1/AN
69 Underclear, Vertical & Horizontal 274 1/AN
70 Bridge Posting 275 1/N
71 Waterway Adequacy 276 1/AN
72 Approach Roadway Alignment 277 1/AN
75 Type of Work 278 - 280 3/N
75A Type of Work Proposed 278 - 279 2/N
75B Work Done By 280 1/AN
76 Length Of Structure Improvement 281 - 286 6/N
90 Inspection Date 287 - 290 4/N
91 Designated Inspection Frequency 291 - 292 2/N
92 Critical Feature Inspection 293 - 301 9/AN
92A Fracture Critical Details 293 - 295 3/AN
92B Underwater Inspection 296 - 298 3/AN
92C Other Special Inspection 299 - 301 3/AN
93 Critical Feature Inspection Dates 302 - 313 12/AN
93A Fracture Critical Details Date 302 - 305 4/AN
93B Underwater Inspection Date 306 - 309 4/AN
93C Other Special Inspection Date 310 - 313 4/AN
94 Bridge Improvement Cost 314 - 319 6/N
95 Roadway Improvement Cost 320 - 325 6/N
96 Total Project Cost 326 - 331 6/N
97 Year Of Improvement Cost Estimate 332 - 335 4/N
98 Border Bridge 336 - 340 5/AN
98A Neighboring State Code 336 - 338 3/AN
98B Percent Responsibility 339 - 340 2/N
99 Border Bridge Structure Number 341 - 355 15/AN
100 STRAHNET Highway Designation 356 1/N
101 Parallel Structure Designation 357 1/AN
102 Direction Of Traffic 358 1/N
103 Temporary Structure Designation 359 1/AN
104 Highway System Of Inventory Route 360 1/N
105 Federal Lands Highways 361 1/N
106 Year Reconstructed 362 - 365 4/N
107 Deck Structure Type 366 1/AN
108 Wearing Surface/Protective System 367 - 369 3/AN
108A Type of Wearing Surface 367 1/AN
108B Type of Membrane 368 1/AN
108C Deck Protection 369 1/AN
109 AVERAGE DAILY TRUCK TRAFFIC 370 - 371 2/N
110 DESIGNATED NATIONAL NETWORK 372 1/N
111 PIER/ABUTMENT PROTECTION 373 1/N
112 NBIS BRIDGE LENGTH 374 1/AN
113 SCOUR CRITICAL BRIDGES 375 1/AN
114 FUTURE AVERAGE DAILY TRAFFIC 376 - 381 6/N
115 YEAR OF FUTURE AVG DAILY TRAFFIC 382 - 385 4/N
116 MINIMUM NAVIGATION VERTICAL CLEARANCE VERTICAL LIFT BRIDGE 386 - 389 4/N
- Washington Headquarters Use 390 - 433 -
CAT10 Bridge Condition (New item in accordance with the Pavement and Bridge Condition Performance Measures final rule, published in January of 2017. This field is not part of the NBI annual file submittal. It is a download field only.) 434 1/AN
CAT23 Condition code value that dictates the overall Bridge Condition. 435 1/AN
CAT29 Deck area as defined by the Pavement and Bridge Condition Performance Measures final rule, published in January of 2017. (This field is not part of the NBI annual file submittal. It is a download field only.) 436 - 445 10/N
Updated: 02/15/2018
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000