National Network
The National Network is a network of approved state highways and interstates for commercial truck drivers in the United States. The Surface Transportation Assistance Act of 1982 authorized the establishment of a national network of highways designated for use by large trucks. On these highways, Federal width and length limits apply. The National Network includes almost all of the Interstate Highway System and other, specified non-Interstate highways. The network comprises more than of highways.
Definition
§658.9 National Network CriteriaThe National Network listed in the appendix to this part is available for use by commercial motor vehicles of the dimensions and configurations described in §658.13 and §658.15. For those States with detailed lists of individual routes in the appendix, the routes have been designated on the basis of their general adherence to the following criteria.
- The route is a geometrically typical component of the Federal-Aid Primary System, serving to link principal cities and densely developed portions of the States.
- The route is a high volume route utilized extensively by large vehicles for interstate commerce.
- The route does not have any restrictions precluding use by conventional combination vehicles.
- The route has adequate geometrics to support safe operations, considering sight distance, severity and length of grades, pavement width, horizontal curvature, shoulder width, bridge clearances and load limits, traffic volumes and vehicle mix, and intersection geometry.
- The route consists of lanes designed to be a width of or more or is otherwise consistent with highway safety.
- The route does not have any unusual characteristics causing current or anticipated safety problems.
Non-Interstate highways
Alabama
Alaska
| Route | From | To |
| AK 1 | Potter Weigh Station Anchorage | AK 3 Palmer |
| AK 2 | AK 3 Fairbanks | Milepost 1412 Delta Junction |
| AK 3 | AK 1 Palmer | AK 2 Fairbanks |
Arizona
Arkansas
No additional routes have been federally designated; under State law STAA-dimensioned commercial vehicles may legally operate on all highways which, prior to June 1, 1991, were designated as Federal-aid primary highways.California
Colorado
No additional routes have been federally designated; under State law STAA-dimensioned commercial vehicles may legally operate on all highways which, prior to June 1, 1991, were designated as Federal-aid primary highways.Connecticut
Delaware
District of Columbia
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
No additional routes have been federally designated; under State law STAA-dimensioned commercial vehicles may legally operate on all highways which, prior to June 1, 1991, were designated as Federal-aid primary highways.Iowa
Note: Iowa State law allows STAA-dimensioned vehicles to operate on all highways in the state. The routes shown below were incorporated into the NN by the FHWA in 1984.| Route | From | To |
| US 6 | NE State Line | I-80 Council Bluffs |
| US 6 | IA 48 Lewis | I-80 N. of Wilton |
| US 6 | IA 130 Davenport | I-74 |
| US 18 | WCL Rock Valley | WI State Line |
| US 20 | I-29 Sioux City | IL State Line |
| US 30 | Missouri River Bridge | IL State Line Clinton |
| US 34 | Missouri River Bridge | IL State Line Burlington |
| US 52 | US 61 Dubuque | IA 386 N. Int. Sageville |
| US 52 | IA 3 Luxemburg | US 18 E. Int. |
| US 52 | ECL Calmar | Burr Oak |
| US 59 | IA 2 Shenandoah | IA 184 |
| US 59 | IA 92 Carson | US 6 N. Int. |
| US 59 | IA 83 Avoca | US 30 Denison |
| US 59 | US 20 Holstein | IA 3 |
| US 59 | IA 10 E. Int. W. of Sutherland | US 18 Sanborn |
| US 61 | Des Moines River Bridge Keokuk | WI State Line |
| US 63 | MO State Line | IA 146 New Sharon |
| US 63 | I-80 Malcom | NCL Chester |
| US 65 | US 34 N. Int. Lucas | IA 117/330 |
| US 65 | US 30 Colo | Sheffield |
| US 65 | SCL Mason City | IA 105 Northwood |
| US 67 | IL State Line Davenport | 4.64 miles N. of Clinton |
| US 69 | SCL Lamoni | I-35 |
| US 69 | US 6/65 Des Moines | IA 105 Lake Mills |
| US 71 | MO State Line | IA 196 Ulmer |
| US 71 | US 20 Early | MN State Line |
| US 75 | I-29 N. Int. Sioux City | IA 9 E. Int. |
| US 77 | NE State Line | I-29 Sioux City |
| US 136 | Des Moines River Bridge | Mississippi River Bridge Keokuk |
| US 151 | I-80 E. of Williamsburg | US 61 S. Int. |
| US 169 | SCL Arispe | IA 92 Winterset |
| US 169 | SCL De Soto | I-80 |
| US 169 | US 6 Adel | IA 141 Perry |
| US 169 | US 30 Beaver | IA 3 |
| US 169 | US 18 Algona | IA 9 W. Int. Swea City |
| US 218 | US 136 Keokuk | IA 92 Ainsworth |
| US 218 | IA 22 Riverside | IA 227 |
| IA 1 | IA 16 N. Int | IA 78 W. Int. Richland |
| IA 1 | IA 92 N. Int | IA 22 Kalona |
| IA 1 | US 6/218 N. Int. Iowa City | I-80 Iowa City |
| IA 1 | SCL Martelle | US 151 |
| IA 2 | NE State Line | IA 25 W. of Mt. Ayr |
| IA 2 | Decatur Co. Line | Mississippi River Bridge Ft. Madison |
| IA 3 | SD State Line | IA 12 N. Int. Akron |
| IA 3 | US 75 Le Mars | IA 7 |
| IA 3 | IA 17 E. Int. Goldfield | IA 13 W. Int. |
| IA 4 | IA 3 Pocahontas | US 18 E. Int. |
| IA 4 | SCL Wallingford | IA 9 Estherville |
| IA 5 | IA 2 Centerville | I-35 |
| IA 7 | IA 3 | US 71 N. Int. Storm Lake |
| IA 7 | Barnum | US 20 Fort Dodge |
| IA 8 | US 63 Traer | US 218 |
| IA 9 | IA 60 | IA 26 Lansing |
| IA 10 | US 59 E. Int | ECL Sutherland |
| IA 12 | US 20 | NCL Sioux City |
| IA 13 | US 30 Bertram | US 52 |
| IA 14 | IA 92/5 | NCL Newton |
| IA 14 | US 30 Marshalltown | US 20 S. Int. |
| IA 15 | US 18 Whittemore | IA 9 W. Int. |
| IA 16 | NCL Eldon | IA 1 N. Int. |
| IA 16 | Denmark | US 61 Wever |
| IA 17 | IA 141 Granger | IA 3 E. Int. |
| IA 21 | SCL What Cheer | IA 412 Waterloo |
| IA 22 | WCL Wellman | IA 70 W. Int. |
| IA 23 | US 63 Ottumwa | IA 137 Eddyville |
| IA 25 | IA 2 | IA 92 Greenfield |
| IA 25 | IA 925 W. Int | IA 44 Guthrie Center |
| IA 26 | IA 9 Lansing | New Albin |
| IA 28 | IA 92 | US 6 Des Moines |
| IA 31 | SCL Correctionville | US 59 |
| IA 37 | WCL Earling | US 59 |
| IA 38 | US 61 Muscatine | I-80 |
| IA 38 | SCL Tipton | US 30 E. Int. |
| IA 39 | US 59 Denison | Deloit |
| IA 44 | US 71 Hamlin | IA 141 |
| IA 46 | IA 5 | IA 163 Des Moines |
| IA 48 | US 59 Shenandoah | NCL Essex |
| IA 48 | US 34 Red Oak | US 6 |
| IA 49 | SCL Lenox | US 34 |
| IA 51 | US 18 Postville | IA 9 |
| IA 55 | Seymour | IA 2 |
| IA 60 | US 75 Le Mars | MN State Line |
| IA 62 | US 61 Maquoketa | US 52 Bellevue |
| IA 64 | US 151 Anamosa | US 61 |
| IA 70 | Columbus City | IA 22 W. Int. |
| IA 77 | IA 92 | Keota |
| IA 78 | IA 149 | IA 249 Winfield |
| IA 78 | WCL Morning Sun | US 61 |
| IA 83 | S. of Walnut | US 6 Atlantic |
| IA 85 | US 63 Montezuma | IA 21 |
| IA 86 | US 71 | IA 9 Montgomery |
| IA 92 | NE State Line | IA 48 Griswold |
| IA 92 | WCL Fontanelle | IA 1 N. Int. |
| IA 92 | IA 1 S. Int | Cotter |
| IA 93 | WCL Sumner | IA 150 Fayette |
| IA 94 | I-380 Cedar Rapids | Palo |
| IA 96 | Gladbrook | US 63 Traer |
| IA 99 | Toolesboro | US 61 Wapello |
| IA 100 | IA 151 Cedar Rapids | I-380 |
| IA 103 | US 218 | US 61 Fort Madison |
| IA 105 | US 69 Lake Mills | US 218 St. Ansgar |
| IA 107 | SCL Thornton | US 18 Clear Lake |
| IA 110 | US 20 | IA 7 Storm Lake |
| IA 111 | US 18 Britt | Woden |
| IA 117 | IA 163 Prairie City | US 65 |
| IA 127 | IA 183 S. Int | US 30 Logan |
| IA 130 | US 61/67 Davenport | I-80 |
| IA 133 | US 30 | Nevada |
| IA 136 | ECL Delmar | WCL Lost Nation |
| IA 136 | SCL Worthington | US 52/IA 3 Luxemburg |
| IA 137 | IA 5 Albia | IA 23 |
| IA 141 | I-29 | US 30/59 Denison |
| IA 141 | WCL Manning | US 169 |
| IA 141 | IA 210 Woodward | I-35 Urbandale |
| IA 144 | IA 141 Perry | US 30 Grand Junction |
| IA 145 | I-29 | ECL Thurman |
| IA 146 | US 63 New Sharon | Dunbar |
| IA 148 | IA 2 Bedford | US 34 |
| IA 148 | IA 951 Carbon | I-80 |
| IA 149 | US 63 | IA 78 Martinsburg |
| IA 149 | SCL Williamsburg | I-80 |
| IA 150 | US 218 Vinton | IA 283 |
| IA 150 | US 20 | US 18 West Union |
| IA 150 | 0 Center Point | IA 150 |
| IA 157 | US 63 | Lime Springs |
| IA 160 | US 69/IA 415 | I-35 Ankeny |
| IA 163 | US 65 Des Moines | IA 92 Oskaloosa |
| IA 173 | IA 83 Atlantic | I-80 |
| IA 175 | NE State Line | ECL Onawa |
| IA 175 | US 71 S. Int | ECL Lake City |
| IA 175 | Gowrie | ECL Dayton |
| IA 175 | WCL Stratford | ECL Radcliffe |
| IA 175 | US 65 N. Int | US 63 Voorhies |
| IA 181 | Melcher-Dallas | IA 5/92 |
| IA 183 | IA 127 N. Int | NCL Pisgah |
| IA 184 | WCL Randolph | US 59 |
| IA 192 | I-29/80 | I-29 Council Bluffs |
| IA 196 | US 71 | US 20 Sac City |
| IA 210 | IA 141 | NCL Woodward |
| IA 210 | IA 17 N. Int | ECL Slater |
| IA 215 | Union | IA 175 Eldora |
| IA 221 | I-35 | Roland |
| IA 227 | US 218 | Stacyville |
| IA 244 | I-80 | IA 191 Neola |
| IA 249 | IA 78 | Winfield |
| IA 272 | Elma | US 63 |
| IA 273 | WCL Drakesville | US 63 |
| IA 276 | US 71 | IA 327 Orleans |
| IA 279 | US 30 | Atkins |
| IA 281 | WCL Fairbank | IA 150 |
| IA 283 | Brandon | IA 150 |
| IA 287 | US 30 | Newhall |
| IA 300 | Modale | I-29 |
| IA 316 | IA 5 Pleasantville | NCL Runnells |
| IA 330 | US 65 | US 30 Marshalltown |
| IA 363 | IA 101 | Urbana |
| IA 401 | US 6 | Johnston |
| IA 405 | Lone Tree | IA 22 |
| IA 406 | US 34 | US 61 Burlington |
| IA 415 | US 6 Des Moines | IA 160 |
| IA 927 | IA 38 Wilton | I-280 Davenport |
| IA 928 | US 20/IA 17 | US 20 Williams |
| IA 930 | US 30 | Ames |
| IA 939 | IA 150 Independence | IA 187 |
| IA 964 | IA 5/92 | IA 975/14 Knoxville |
| IA 967 | US 20 | Farley |
| IA 975 | IA 5/92 | IA 964/14 Knoxville |
| University Ave | US 20 SW. of Cedar Falls | US 218 Cedar Falls |
Kansas
No additional routes have been federally designated; under State law STAA-dimensioned commercial vehicles may legally operate on all highways which, prior to June 1, 1991, were designated as Federal-aid primary highways.Kentucky
Note: US 23 crosses the Ohio River between South Shore, KY and Portsmouth, OH via the U.S. Grant Bridge. Although the state line is near the Ohio shoreline, putting most of the bridge in Kentucky, the terminal point for US 23 is listed as the south end of the bridge because the bridge is maintained by the Ohio DOT.Louisiana
No additional routes have been federally designated; under State law STAA-dimensioned commercial vehicles may legally operate on all highways which, prior to June 1, 1991, were designated as Federal-aid primary highways.Maine
Maryland
Note: I-895 Baltimore — Widths over 96 inches and tandem trailers may be prohibited on the Harbor Tunnel Thruway because of construction.Massachusetts
Michigan
Minnesota
NOTE: I-35E St. Paul — The parkway segment of I-35E from 7th Street to I-94 is not available to trucks because of reduced design standards.Mississippi
No additional routes have been federally designated; under State law STAA-dimensioned commercial vehicles may legally operate on all highways which, prior to June 1, 1991, were designated as Federal-aid primary highways.Missouri
Montana
No additional routes have been federally designated; under State law STAA-dimensioned commercial vehicles may legally operate on all highways which, prior to June 1, 1991, were designated as Federal-aid primary highways.Nebraska
No additional routes have been federally designated; under State law STAA-dimensioned commercial vehicles may legally operate on all highways which, prior to June 1, 1991, were designated as Federal-aid primary highways.Nevada
No additional routes have been federally designated; under State law STAA-dimensioned commercial vehicles may legally operate on all highways which, prior to June 1, 1991, were designated as Federal-aid primary highways.New Hampshire
New Jersey
New Mexico
New York
North Carolina
Note: US 74 Charlotte — STAA-dimensioned vehicles are subject to State restrictions on US 74 in Charlotte because of narrow lane widths.North Dakota
Ohio
No additional routes have been federally designated; under State law STAA-dimensioned commercial vehicles may legally operate on all highways which, prior to June 1, 1991, were designated as Federal-aid primary highways.Oklahoma
No additional routes have been federally designated; STAA-dimensioned commercial vehicles may legally operate on all Federal-aid Primary highways under State law.Oregon
Pennsylvania
Puerto Rico
Note: Routes added to the Interstate System under 23 U.S.C. 139 are included only to the extent designated above.Rhode Island
South Carolina
South Dakota
No additional routes have been federally designated; under State law STAA-dimensioned commercial vehicles may legally operate on all highways which, prior to June 1, 1991, were designated as Federal-aid primary highways.Tennessee
Texas
No additional routes have been federally designated; under State law STAA-dimensioned commercial vehicles may legally operate on all highways which, prior to June 1, 1991, were designated as Federal-aid primary highways.Utah
No additional routes have been federally designated; under State law STAA-dimensioned commercial vehicles may legally operate on all highways which, prior to June 1, 1991, were designated as Federal-aid primary highways.Vermont
Virginia
Note 1: I-66 Washington, D.C., area — There is a 24-hour total truck ban on I-66 from I-495 Capital Beltway to the District of Columbia..Note 2: I-264 Norfolk — Truck widths are limited to 96 inches for the westbound tube of the Elizabeth River Downtown Tunnel from Norfolk to Portsmouth because of clearance deficiencies.
Washington
No additional routes have been federally designated; under State law STAA-dimensioned commercial vehicles may legally operate on all highways which, prior to June 1, 1991, were designated as Federal-aid primary highways.West Virginia
Wisconsin
Wyoming
No additional routes have been federally designated; under State law STAA-dimensioned commercial vehicles may legally operate on all highways which, prior to June 1, 1991, were designated as Federal-aid primary highways.Note: Information on additional highways on which STAA-dimensioned vehicles may legally operate may be obtained from the respective State highway agencies.