California Department of Transportation

The $214.5 million project will widen State Route 99 (SR-99) from a four lane to a six lane freeway beginning at Arch Road to South of SR-4/Crosstown Freeway. The project will build bridges and rebuild existing interchanges while permanently closing some existing ones. When complete, the project will ease congestion, improve mobility, decrease commute times, and enhance safety within and through the county.