Trucking News · California · November 10, 2026

Truckers: SR 60 Ramps at Western Knolls Avenue Close to Trucks Until Spring

Illustration of a flagger in a safety vest and hard hat waving a lime green semi-truck through a highway construction zone — Illustration for this story. Not a photo of a specific location.

Image caption: Illustration: AI-generated illustration, not a photo of the people, vehicles or places in this story. It shows a flagger in a safety vest and hard hat waving a lime green semi-truck through a highway construction zone.

Truckers who use State Route 60 in Riverside County, California, have a long detour ahead. As of Monday, Nov. 9, the westbound SR 60 on- and off-ramps at Western Knolls Avenue are closed to trucks, freight vehicles and tractor-trailers, Land Line reports. The closure is in place around the clock and is expected to last through spring 2027.

Passenger vehicles can still use the ramps during the closure. Trucks cannot.

The detour

Truck traffic through the area is being sent to Potrero Boulevard and Oak Valley Parkway to reach Interstate 10 before reconnecting to westbound State Route 60, according to Land Line. Construction work, including repaving, lane striping and moving utilities, is scheduled on weekdays.

The project

The closure is part of the second phase of the SR 60 and Potrero Boulevard Interchange Project, which began in May 2026. The $64 million project includes a new six-ramp partial cloverleaf interchange, the realignment of Western Knolls Avenue and the widening of Potrero Boulevard to six lanes, according to the Riverside County Transportation Commission.

The first phase was finished in 2019, when a six-lane Potrero Boulevard overcrossing was completed. The current phase is funded through the City of Beaumont Capital Improvement Plan, the Transportation Uniform Mitigation Fee and the state's SB1 Trade Corridor Enhancement Program, Land Line reports.

The project website lists better regional mobility, improved access to State Route 60, less congestion and support for economic growth among the expected benefits along the corridor.

A heavy truck corridor

Dense truck traffic is common on State Route 60 through the Inland Empire, state transportation officials said. It is estimated that more than 20,000 trucks a day use the highway, as much as 13% of all vehicle traffic.

Truckers planning routes in the area can check the Riverside County Transportation Commission website for project updates, as Land Line notes more information is posted there.

Big Rig Daily has covered other long-running closures that send trucks off their usual routes, including the I-285 closure and truck detour signs in Georgia.