I-10 Mount Vernon Avenue Improvements

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Planning
Environmental
Design
Construction
Completion

The San Bernardino County Transportation Authority (SBCTA), California Department of Transportation (Caltrans), and the City of Colton have partnered to improve Mt. Vernon Avenue over Interstate 10 (I-10). The project will enhance circulation and mobility along Mount Vernon Avenue between East Valley Boulevard to the north and the I-10 eastbound ramps/Mt. Vernon Avenue intersection to the south.

Improvements include replacing and widening the existing Mt. Vernon Avenue bridge over I-10, upgrading roadway and intersection operations, and enhancing bicycle and pedestrian facilities through the interchange. The project will also provide Americans with Disabilities Act (ADA) compliant curb ramps, crossing activators, and tactile warning surfaces at intersections where crosswalks are included.

These upgrades will help reduce local congestion, improve safety for all users, and support future transportation improvements in the corridor, including planned I-10 Express Lanes. Construction began in May 2026.

Through the end of 2026, construction crews will focus on completing the pump station, including ongoing construction activities and related work within the project area. Intermittent lane and ramp closures within the project limits will be needed to facilitate these activities.

Construction work will generally take place Monday through Friday during daytime hours (7:00 a.m. to 4:00 p.m.) and nighttime hours (8:00 p.m. to 5:00 a.m.). Motorists are advised to reduce speeds, follow all posted signage, and use caution when traveling through the work zone. Please check the Google Map for the most up-to-date closure information.

Fact Sheets

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Mt. Vernon Avenue Improvements Project at I-10 Virtual Open House PPT Presentation

Mt. Vernon Avenue Improvements Project at I-10 Public Notice English

Mt. Vernon Avenue Improvements Project at I-10 Public Notice Spanish

Mt. Vernon Avenue Improvements Project at I-10 Initial Study with Proposed Mitigated Negative Declaration

Mt. Vernon Avenue Improvements Project at I-10 Final Environmental Document

Mt. Vernon Avenue Improvements Project at I-10 Approved Project Report