Southbound 71 Nightly Full Closures⛔ The Riverside County Transportation Commission’s 71/91 Interchange Project will require nightly full closures (Monday – Friday) of southbound 71 at Butterfield Ranch Rd./Euclid Ave. in Chino and Chino Hills beginning Monday, March 3, 2025. These closures will allow crews to safely remove support structures and are scheduled to occur through early-October. &##128679; Full Southbound 71 Closures ⌚ Monday – Thursday Nights, 9 p.m. to 5 a.m. ⌚ Friday Nights,