I-10 Mount Vernon Avenue Improvements
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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.
Over the coming weeks, construction crews will continue roadway excavation activities along the project corridor. Crews will also begin mobilizing large construction equipment within the project area in preparation for upcoming shoring operations. 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
Construction crews will continue shoring and drainage activities as part of the I-10 Mt. Vernon Avenue Improvements Project during the week of June 29.
Shoring activities will occur along eastbound (EB) and westbound (WB) I-10 between 9th Street and Sperry Drive during daytime hours behind K-rail barriers. Drainage improvements will continue on the EB I-10 on- and off-ramps and will require nighttime ramp closures. The following lane and ramp closures are required to safely facilitate this work:
- Intermittent lane closures are scheduled daily from 7:00 a.m. to 4:00 p.m., Monday, June 29 through Friday, July 3, on Mt. Vernon Avenue between Valley Boulevard and the EB I-10 off-ramp and on Valley Boulevard, just west of Mt. Vernon Avenue and N. Sperry Drive. Motorists should expect traffic control and brief delays in the work area.
- EB I-10 on- and off-ramp at Mt. Vernon Avenue will be closed nightly from 9:00 p.m to 5:00 a.m., Monday, June 29, through Wednesday, July 1 (into Thursday morning). Detour routes will be posted.
