Tribal Transportation Improvement Program (TTIP) and State Transportation Improvement Program (STIP)

FHWA Agreement Tribes Planning Process

The Federal Highway Administration Tribal Transportation Program team works in consultation with Tribal Governments to achieve transportation planning on Tribal lands. A Tribal Transportation Program (TTP) Agreement between the U.S. Department of Transportation and a Tribe provides an understanding that Tribal Governments inherit "all the functions and duties that the Secretary of Interior would have performed (Chapter 2 of Title 23, USC)." As per this legislation, a major planning effort FHWA has approval authority on, in partnership with a Tribe, is the development of an annual TTP Transportation Improvement Program (TTPTIP) derived from a list of eligible projects approved under a Tribe's individual TIP. The transportation planning process on Tribal lands as a whole is carried out by the Tribal Government's staff.

TTIP Process Diagram

Tribal Transportation Improvement Program TTIP Tools for FHWA Agreement Tribes
  • Fiscally and financially constrained
  • Contains projects eligible for TTP funding
  • Included in the TTPTIP
  • Included in the Statewide Transportation Improvement Program (STIP)
  • Reviewed and updated as necessary by a Tribal Government

Incorporating the TTPTIP into the STIP

The TTPTIP is a financially constrained compilation of all Tribal Governments' TTIP projects organized by year, State, and Tribe. It may also include projects and activities funded with funding sources other than the TTP funds (25 CFR 170.422). As outlined in 25 CFR 170.426, the approval process for the TTPTIP is as follows:

Diagram showing the development process for TTPTIP Diagram showing the development process for STIP
  1. 1. The BIA Regional Office and FHWA work together to review and concur on the TTPTIPs and forward to the Secretaries for review and approval.
  2. 2. Once approved, copies of the approved TTPTIP are made available back to the FHWA, BIA Regional Offices, and Tribal Governments.
  3. 3. FHWA provides copies of the approved TTPTIP to the FHWA Division Office in each State for transmittal to the State Departments of Transportation for inclusion in the State Transportation Improvement Program (STIP).
Tribal Transportation Improvement Programs (TTIP)
Full TTIPs by BIA Regions
State Transportation Improvement Program (STIP)
TTP Construction Projects Only
Alaska Alaska
Eastern Massachusetts
  New York
  North Carolina
  South Carolina
Eastern Oklahoma Oklahoma
Great Plains North Dakota
  South Dakota
Northwest Idaho
  Washington
Pacific California
Rocky Mountain Montana
Southern Plains Region Oklahoma
  Texas
Southwest and Navajo New Mexico
Western and Navajo Arizona
  Nevada