SAN FRANCISCO (AP) - Eight states on the East and West coasts have formally committed to working together to put 3.3 million zero-emission vehicles on the nation's roads by 2025.

The so-called "action plan" released Thursday follows last year's commitment by the governors of eight states, including California and New York, to creating charging stations and other infrastructure needed to grow the nation's market for plug-in hybrids, battery powered cars and other clean-burning vehicles.

The other states in the pact are Massachusetts, Maryland, Oregon, Connecticut, Rhode Island and Vermont. The eight states represent about 23 percent of the U.S. auto market.

By signing the plan, each state agrees to more quickly build charging stations by removing red tape. They also agree to take other measures to make the cars more attractive to consumers.