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Surface Transportation Program (STP) Regional


Program Purpose

The Surface Transportation Program (STP) is the most flexible of all the highway programs and the one that provides the most financial support to local agencies. Projects eligible for STP funding includes highway and bridge construction and repair; transit capital projects; bicycle, pedestrian, and recreational trails; construction of ferry boats and terminals. MAP-21 requires 50% be sub-allocated based on population and 50% is for any area of the state.

WSDOT allocates (pdf 593 kb) STP funds to Metropolitan Planning Organizations (MPO’s) and County Lead Agencies for prioritizing and selecting projects that align with their regional priorities involving all entities eligible to participate in a public process. In addition, WSDOT sets delivery targets (pdf 366 kb) for each MPO and county lead agency.

STP funds are split – 50% is sub-allocated based on population (based on 2010 Census - pdf 285 kb) as follows:

  • Areas Over 200,000 population (Urbanized) – the funds are distributed to Benton Franklin Council of Governments (BFCG), Puget Sound Regional Council (PSRC), Spokane Regional Transportation Council (SRTC) and Southwest Washington Regional Transportation Council (RTC), based on the MPOs respective levels of urbanized population per the 2010 census. Project selections are made by the MPOs in consultation with the State.
  • Areas between 5,000 population and 200,000 population (Urban) – the funds are distributed to MPOs and county lead agencies based upon the 2010 census for areas of this size.
  • Areas Less than 5,000 population (Rural) – the funds are distributed to MPOs and county lead agencies based upon the 2010 census for the rural population areas of the state. This is the first time since 1991 that the rural formula has been modified. MAP-21 maintains the abilities for localities to utilize up to 15 percent of the amount reserved for rural areas for rural minor collector improvements.

The remaining 50% includes:

  • Set-aside for bridges of the federal aid system (WA - ~$22.9 million). For additional details see the Bridge program .
  • Remainder is split between the state and local governments to maintain the 66% WSDOT / 34% local distribution of total federal funds.

For details specific to your area, contact your MPO/RTPO/County (pdf 107 kb) lead agency. Further details on the STP program are available at: