Interstate 15 Interim Corridor Operations Project

Status: Pre-Construction

Location: Western Riverside County

Type of Project: Highways

Location: Southbound Interstate 15, Cajalco Road interchange to the Weirick Road southbound off-ramp

Construction: Anticipated from spring 2022 to late summer/early fall 2022

Investment: Estimated $5 million


Since the opening of the 15 Express Lanes in April, traffic congestion has grown where the tolled lanes terminate at Cajalco Road in Corona, due to vehicles merging and weaving 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 has provided input regarding safety and vehicle pull-over locations.

To add the new southbound I-15 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 15 Corridor Operations Project could be completed. The interim project would provide three 11-foot wide lanes, one 12-foot wide lane, a varying 3.8-foot wide outer shoulder, and a varying 2.5-foot wide inner shoulder on southbound I-15 between the Cajalco Road and Weirick Road interchanges.

RCTC is conducting engineering and environmental studies, as well as the project design. Procurement is planned for early 2022, with the award of a construction contract expected in spring 2022.

Construction could start in spring of 2022 and the new lane may open by late summer/early fall 2022.

Interstate 15 Interim Corridor Operations Project