Interstate 15 Interim Corridor Operations Project

Status: Construction

Location: Western Riverside County

Type of Project: Highways

Location: Southbound Interstate 15, Cajalco Road on-ramp to Weirick Road off-ramp

Construction: Week of May 23, 2022 to late summer/early fall 2022

Investment: $5 million


Since the opening of the 15 Express Lanes in April 2021, traffic congestion has increased where the tolled lanes end at Cajalco Road in Corona, due to vehicles merging to the general-purpose lanes.

The Interim Corridor Operations Project is the result of an agency task force led by staff from RCTC, Caltrans, the City of Corona, and the County of Riverside. The group began meeting in June 2021 to study alternatives and develop near-term improvements to help improve traffic flow. The CHP also provided input regarding safety and vehicle pull-over locations.

The project will add a non-tolled travel lane to southbound Interstate 15 between the Cajalco Road on-ramp and the Weirick Road off-ramp, a distance of just under one mile. To add the  lane, crews will strengthen the pavement of the outer and inner I-15 shoulders to handle traffic loads for an interim three-year period until RCTC’s Interstate 15 Corridor Operations Project can be completed. For the interim project, crews will restripe the roadway to provide three 11-foot wide lanes, one 12-foot wide lane, a varying 3 to 8-foot wide outer shoulder, and a varying 2 to 5-foot wide inner shoulder.

RCTC completed engineering and environmental studies, as well as the project design, in early 2022. RCTC awarded a construction contract on March 9, 2022. Work is expected to begin the week of May 23, 2022 and be completed by late summer or early fall 2022. The contract includes incentives for early completion.

Construction will begin the week of May 23, 2022 and the new lane is anticipated to open in late summer or early fall 2022. The construction contract includes financial incentives for opening the lane ahead of schedule.