Growth Management Program (GMP)

Growth Management Program (GMP) Measure C (1988), and Measure J (2004) contain two key components: first, a half-cent sales tax program that generates in aggregate $3 billion in new revenues for transportation improvement projects and programs; and second, a Growth Management Program (GMP) that is designed to help Contra Costa County plan for and accommodate

State Route 242 / Clayton Road Ramps

State Route 242 / Clayton Road Ramps State Route 242 (SR242) is a 3.4-mile long connector freeway that links I-680 to State Route 4. In addition, the SR242 corridor serves commercial, light industrial and residential land uses in the City of Concord. The interchanges at Clayton Road and Concord Avenue are considered the primary access