The Riverside County Transportation Commission (RCTC) is alerting motorists to steer clear of the westbound 91 in Corona on weeknights due to full westbound 91 closures between State Route 71 and Green River Road for RCTC’s 71/91 Interchange Project starting on Monday, December 2. The full nighttime westbound 91 closures are scheduled Monday through Wednesday nights. Due to the holidays, no closures will be scheduled from December 18 through January 2, 2025. The full westbound 91 closures will resume on Monday, January 6 and are anticipated to be completed on January 22, 2025.

Motorists traveling on the westbound 91 and southbound 71 should plan extra time to reach local destinations and businesses in the area. Detailed closure information below:

• Full closure of westbound 91 lanes from the 71 to Green River Road, Monday through Wednesday from 10 p.m. to 4 a.m.
• Full westbound 91 Express Lanes closures from I-15 to the Orange County/Riverside County Line, Monday through Wednesday from 8 p.m. to 4 a.m.
• Full southbound 71 to westbound 91 connector closure, Monday through Wednesday from 9 p.m. to 5 a.m.
• Full southbound 15 to westbound 91 Express Lanes connector closure, Monday through Wednesday from 8 p.m. to 4 a.m.
• Full northbound 15 to westbound 91 Express Lanes connector closure, Monday through Wednesday from 8 p.m. to 4 a.m.
• Westbound 91 Green River Road off-ramp closure, Monday through Wednesday from 9 p.m. to 4 a.m.

To avoid lengthy traffic delays, motorists are highly advised to avoid the westbound 91 by using the northbound 71 to westbound 60 to southbound 57 to get around the closure. Construction activity is subject to change due to weather or other factors.

The full closure will allow crews to remove more than 40 beams of support structures that span above the westbound 91 lanes. This work requires precision and time to be completed safely. Over the summer, crews completed a similar operation with the removal of support structures over eastbound 91.

RCTC, in partnership with Caltrans, is reconstructing the 71/91 interchange in Corona. The project will replace the single-lane loop connector between the eastbound 91 and northbound 71 with a new, two-lane, direct connector ramp. The project is anticipated to be completed in 2025.

To register for construction updates, text 7191interchange to (855) 793-2625 or sign up through the project webpage, rctc.org/71-91interchange.