SR-78 Projects

State Route 78 (SR-78) serves as the primary east-west travel corridor between Escondido and Oceanside, traversing through Carlsbad, Vista, and San Marcos, as well as unincorporated areas of San Diego County. It is the main route for local and regional travel in North County and provides north-south connections to Interstates 5 and 15.

Current SR-78 Corridor projects include:

For more information on these projects, please visit their pages linked above. 

To stay up to date with SR-78 projects, please visit to sign up for updates. 

For any questions or comments on projects on the SR-78 corridor, please contact the project team by emailing, and a team member will respond to you promptly.