SR-60 westbound Western Knolls ramps in Beaumont closed to trucks until spring 2027
Since the week of Nov. 9, trucks can no longer use the westbound SR-60 on- and off-ramps at Western Knolls Avenue in Beaumont, Calif. The closure for the Potrero interchange project runs 24 hours a day through spring 2027, with a posted truck detour via I-10.
The ramps stay open to passenger vehicles. Big rigs and other freight vehicles must follow a posted detour along Potrero Boulevard and Oak Valley Parkway to I-10, then return to westbound SR-60, the Riverside County Transportation Commission (RCTC) said. Crews are realigning Western Knolls Avenue, with weekday work on repaving, lane striping and utility relocation.
The ramp closure comes with the second phase of the new SR-60 interchange at Potrero Boulevard, a $64 million job that started in May 2026. It adds a six-ramp partial cloverleaf interchange and widens Potrero Boulevard to six lanes. RCTC is building it with the City of Beaumont and Caltrans, and the new interchange is expected to open in 2028.
State transportation officials estimate that more than 20,000 trucks use SR-60 in Riverside County every day, as much as 13% of all traffic, Land Line reported. RCTC says the construction schedule can change.
Why it matters: Westbound trucks that used the Western Knolls Avenue ramps must take the I-10 detour around the clock until spring 2027, so Inland Empire routes through Beaumont need the extra miles built in now.
If this affects you
- RCTC says trucks are barred from the Western Knolls Avenue ramps on westbound SR-60 around the clock from the week of Nov. 9, 2026, through spring 2027. rctc.org
- The truck detour uses Potrero Boulevard and Oak Valley Parkway to reach I-10, then returns to westbound SR-60. rctc.org
- The project helpline is (951) 200-4158, and text alerts come by texting Potrero to (855) 793-2625. rctc.org
Sources
- SR-60/Potrero Interchange Project (Phase II): Construction UpdatesRiverside County Transportation Commission, Nov 8
- Months-long closure will affect truck trafficLand Line Media, Nov 9