SACRAMENTO - Senator Scott Wiener (D-San Francisco)’s legislation Senate Bill 339, the Gas Tax Alternative Pilot, passed the Senate by a vote of 26-9. This pilot program, which allows California to study a road user charge based on vehicle miles traveled (VMT) instead of relying on gas taxes, is a critical strategy as the state transitions away from fossil fuels. Gas taxes fund California’s roads, highway system, and public transportation systems.