The Napa Valley Transportation Authority (NVTA) is a Congestion Management Agency formed in 1998 as a joint effort by the cities of American Canyon, Calistoga, Napa, St. Helena, the town of Yountville and the County of Napa. NVTA serves as the countywide transportation planning agency. The agency's goals, duties and composition make it easier for local governments to tackle the increasingly complex problem of traffic congestion.

What is a Congestion Management Agency (CMA)?

Congestion Management Agencies were created through the passage of Proposition (Prop.) 111 by California voters in 1990. Proposition 111 added 9¢ per gallon to the state fuel tax to fund local, regional and state transportation projects and services.