Indian Affairs | Indian Reservation Roads

Indian Reservation Roads Inventory (IRR)

The Indian Reservation Roads (IRR) Program addresses transportation needs of tribes by providing funds for planning, designing, construction, and maintenance activities for all public roads.  The program is jointly administered by the Federal Highway Administration’s Federals Lands Highway Office and the BIA, Division of Transportation, in accordance with an interagency agreement.  The authorizing legislation is the highway authorization act (currently the Safe, Accountable, Flexible and Efficient Transportation Equity Act – A Legacy for Users (SAFETEA-LU)) and codified in Title 23 U.S.C. and 25 C.F.R. Part 170.

The Indian Reservation Roads are public roads which provide access to and within Indian reservations, Indian trust land, restricted Indian land, and Alaska native villages. Approximately 29,000 miles are under the jurisdiction of BIA and tribes and another 73,000 miles are under State and local ownership.  The IRR program funds can be used for any type Title 23 transportation project providing access to or within Federal or Indian lands and may be used for the State/local matching share for apportioned Federal-aid Highway Funds

The IRR Inventory is a comprehensive database of all transportation facilities eligible for IRR Program funding by tribe, reservation, BIA agency and region, Congressional district, State, and county. Other specific information collected and maintained under the IRR Program includes classification, route number, bridge number, current and future traffic volumes, maintenance responsibility, and ownership.

Tribal Transportation Program Coordinating Commitee Meeting Minutes

Indian Reservation Roads Inventory

Updated 09-10-07


Alaska   (.pdf)- 879 KB
Eastern   (.pdf)- 422 KB
Eastern Oklahoma   (.pdf)- 1,051 KB
Great Plains   (.pdf)- 600 KB
Midwest   (.pdf)- 812 KB
Navajo   (.pdf)- 528 KB
Northwest  (.pdf)- 687 KB
Pacific   (.pdf)- 309 KB
Rocky Mountain   (.pdf)- 418 KB
Southern Plains   (.pdf)- 386 KB
Southwest   (.pdf)- 422 KB
Western   (.pdf)- (68 KB


IRR Report Legend   (.pdf)- 15 KB
IRR Coding Guide   (.pdf)- 421 KB

If you have any questions regarding this information, please call Mr. Sheldon Kipp, Division of Transportation, Office of Indian Services, Bureau of Indian Affairs at (505) 563-3320.