April 28, 2003

Bride (HBRRP or the Bridge Program)

The Highway Bridge Replacement and Rehabilitation Program was established by Congress in 1978 to provide federal aid to repair or replace aging bridge infrastructure.

Interstate Maintenance (IM)

Originally established under ISTEA, the Interstate Maintenance program provides federal funds to maintain and improve the now complete 46,000 mile Interstate system.

National Highway System (NHS)

The National Highway System provides federal funding for construction and maintenance of the roughly 160,000 miles of roads on the National Highway System including the Interstate system, and designated rural and urban roads, and mostly larger principal arterials.

Congestion Mitigation and Air Quality (CMAQ)

The Congestion Mitigation and Air Quality Improvement program was created under ISTEA and continued under TEA-21. CMAQ provides a flexible funding source to State and local governments for transportation projects and programs to help meet the requirements of the federal Clean Air Act.

Surface Transportation Program (STP)

The Surface Transportation Program is the law's most flexible program. STP provides funding for the construction and maintenance of highways and bridges on the Interstate system and other National Highway System roads, as well as for many other highways and transit projects.