The Point: Nightly closures will allow crews to safely remove support structures from the new connector above southbound 71 lanes
Motorists traveling on southbound 71 through Chino Hills are advised to be prepared for weeknight (Monday – Friday) full closures of southbound 71 from Butterfield Ranch Rd/Euclid Ave to the 91. The closures of southbound 71 will begin Monday, March 3 through Friday, March 28 as part of RCTC’s 71/91 Interchange Project. The southbound 71 to eastbound and westbound 91 connectors will also be closed during this time.
The closures will take place from 9 p.m. to 5 a.m., Monday through Thursday nights, and 11:59 p.m. to 6 a.m. on Friday nights. These nighttime closures will allow construction crews to safely remove support structures from the recently constructed new sections of the connector. Additional nighttime lane reduction configurations along eastbound and westbound 91 may also occur during these nightly closures.
To avoid traffic delays, motorists are urged to avoid the southbound 71 and use southbound 57 or southbound I-15 to reach the 91 and other destinations located to the south.
Motorists traveling on southbound 71 will be rerouted to the Euclid Ave off-ramp in Chino Hills. Traffic will be detoured northbound along Euclid Ave to either eastbound or westbound 60, where motorists can travel to either southbound I-15 or southbound 57. Fire, police, and ambulance services will have access for emergency response.
Construction activity is subject to change due to site conditions, weather, or other factors. If the work cannot be completed, it will be rescheduled as soon as possible.
The new non-tolled interchange is designed to improve safety, expand access to other modes of travel, reduce greenhouse gas emissions, enhance traffic flow, and support continued movement of native wildlife through the area. Construction began in 2023 and is expected to be completed later this year. To register for construction updates, text 7191interchange to (855) 793-2625 or sign up through the project webpage. For the latest closure information, visit: rctc.org/7191Closures