Caltrans Plans $6 Million I-15 Safety Project in Corona
Caltrans is planning a $6 million safety project on southbound Interstate 15 in Corona that would add a deceleration lane north of the Ontario Avenue exit and a standard shoulder along the freeway.
Construction is anticipated to begin in late 2026. The project is not yet under construction, and Caltrans has not announced a specific start date, completion date, contractor or detailed traffic-control plan.
The planned work affects the southbound freeway between Old Temescal Road and Ontario Avenue, a section of I-15 that Caltrans says has traffic-congestion-related collisions. For Corona drivers, the immediate development is a defined state project and a future construction period on a major commuter route through the city.
Lane and shoulder work planned
Caltrans’ project description calls for a 12-foot deceleration lane north of the Ontario Avenue exit. The agency also plans a 10-foot standard shoulder within the project area.
The stated limits run from Old Temescal Road to Ontario Avenue in Corona. The announced scope is limited to that southbound section and those roadway improvements; Caltrans has not published a broader project description for the full I-15 corridor.
The project was listed by Caltrans District 8 on July 1, 2026, with a $6 million cost. The agency identifies the lane and shoulder additions as safety work for the southbound segment.
Collision concern is the stated reason
Caltrans says congestion-related collisions occur on this portion of southbound I-15. That is the safety concern identified in the agency’s project information.
The project description does not provide a forecast for collision reductions, travel-time changes or congestion relief. It also does not state that the new lane and shoulder will eliminate crashes or congestion.
That distinction matters as the project moves toward construction. The announced improvements are specific: a 12-foot deceleration lane near the Ontario Avenue exit and a 10-foot shoulder between Old Temescal Road and Ontario Avenue. Their eventual performance has not been quantified in the material released by Caltrans.
Construction details still to come
Late 2026 is an anticipated construction window, not a confirmed work-start day. Caltrans has not identified an awarded contractor in the available project information, nor has it released a construction duration or detailed plan for managing traffic through the work zone.
As a result, drivers do not yet have confirmed information about lane closures, work hours, detours or other traffic restrictions tied to the project. Those details would become important for commuters using southbound I-15 through Corona once scheduling and construction planning advance.
The next known step is contractor mobilization and construction scheduling later in 2026. Until then, the project remains a planned improvement rather than an active roadway work zone.
Where residents can watch for updates
Corona’s Public Works Department maintains an active-project and commuter-alert resource that directs residents to construction updates and traffic information. The city page covers local public-works projects and is a local source for road-impact notices as work approaches.
For now, the confirmed plan is a $6 million Caltrans project on southbound I-15 in Corona, from Old Temescal Road to Ontario Avenue. It would add the deceleration lane north of the Ontario Avenue exit and a standard shoulder, with construction anticipated in late 2026.
Sources
- I-15 Deceleration Lane in Corona, California Department of Transportation, District 8
- Active Projects and Commuter Alerts, City of Corona
Look for updates to this story
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