News Details

I-10/Monroe Street Interchange update

Alternative 2 (Locally Preferred Alternative) – Project Study Area

Work is continuing on a project to update and improve the Interstate 10/Monroe Street interchange, with an open house format public hearing planned for Spring 2020.

Three alternatives are being evaluated in collaboration with the California Department of Transporation and the County of Riverside: Alternative 1 (No Build Alternative), Alternative 2 (Tight Diamond Interchange), and Alternative 4 (Diverging Diamond Interchange). Alternative 2 (Tight Diamond Interchange) was identified as the Locally Preferred Alternative at a City Council meeting on July 17, 2019. 

Some improvements include reconstructing and widening the I-10/Monroe Street bridge overcrossing and the Coachella Valley Stormwater Channel bridge; reconstructing and widening the existing on- and off-ramps; adding an eastbound auxiliary lane between the Monroe Street and Jackson Street interchanges; adding acceleration and deceleration lanes at the westbound Monroe Street on- and off-ramps and a deceleration lane at the eastbound Monroe Street off-ramp.

The current estimated project cost is $85 million.

Preliminary planning has been completed and the project is currently in the Project Approval and Environmental Document (PA/ED) phase in the Caltrans delivery process. Final design and construction dates are tentative, pending funding.

Project Schedule



Begin Date

End Date

Preliminary Planning Phase


May 2015

December 2016

Project Approval and Environmental Document


January 2018

June 2020

Final Design1

Not Started

October 20201

October 20221


Not Started

July 20231

June 20251

1 Subject to the availability of funds, dates are estimated.