SDDOT / Project Development / Planning / Highway Classification / Federal Aid

Planning Data Manager: Larry Dean
Phone: (605) 773-3157; Fax (605) 773-6608

Planning and Programs is responsible for working with local governments to depict which roadways are eligible for receiving federal-aid for construction and improvements.

All public roads functionally classified at least as a rural major or urban minor collector or higher classification are eligible for Federal assistance provided by ISTEA and continued through TEA 21. These roads are referred to as "Federal-aid Highways".

Prior to the Intermodal Surface Transportation Efficiency Act (ISTEA) of 1991, the Federal-aid Highway Program was directed primarily toward the construction and improvement of four Federal-aid systems: the Interstate (FAI), Primary (FAP), Urban (FAU) and Secondary (FAS) systems. The ISTEA restructured the Federal-aid system and repealed the FAI, FAP, FAU, and FAS system. Instead of four Federal-aid systems, there are now two federal-aid systems: The National Highway System (NHS) and the Surface Transportation Program (STP). The Interstate system, is a component of the NHS.

For areas of less than 5,000 population, the Surface Transportation Program permits up to 15 percent of the amount reserved for rural areas to be spent on rural minor collectors, at the State of South Dakota's discretion. South Dakota Department of Transportation also distributes a portion of the STP funding to urbanized areas above the population of 5000. The Office of Local Government Assistance is responsible for the distribution to the local government entities.

Flood damage to non-federal-aid roads may be eligible for FEMA funding.

FEDERAL AID MAPS by County - Adobe PDF Files