Construction projects on both sides of the Bay this weekend are expected to cause delays for motorists. Here’s what to know about the projects and how to plan ahead. Westbound Carquinez Bridge on Interstate 80 to shut down Caltrans will close the westbound Carquinez Bridge on Interstate 8 0 for 53 hours starting Friday night as crews work on a deck rehabilitation project. The closure will start at 10 p.m. and continue through the weekend. It is scheduled to end by 3 a.m. Monday. The eastbound direction of the bridge will remain open. The San Francisco Bay Ferry said it would provide additional ferry trips Saturday and Sunday on the Vallejo route during the westbound closure. The exact closure will be westbound I-80 between the east end of the bridge and start of the westbound off-ramp to Pomona Street, from Sonoma Boulevard, Sequoia Avenue, Magazine Street and Lincoln Road. Below is a map of the closure: Detours during weekend Carquinez Bridge closure Motorists traveling westbound from Sacramento can take the following alternate routes: Detour for westbound I-80 traffic (before Exit 4): Take exit 40 to merge onto southbound Interstate 680 Continue on southbound I-680 Take exit 53 to merge onto westbound Highway 4 Continue on westbound Highway 4 Take exit 1B, merge onto westbound I-80 To completely avoid the Carquinez Bridge closure, motorists can use westbound I-680. Regional detour map for motorists traveling westbound from Sacramento (Caltrans) Detour for southbound Highway 29 traffic: Detour to Curtola Parkway and stay in the through lane at the Curtola Parkway/Lemon Street intersection to merge onto eastbound Interstate 780 Continue on eastbound I-780 and stay in the left lane Take exit 7B to merge onto southbound I-680 Continue on southbound I-680 Take exit 53 to merge onto westbound I-80 Detour for South Vallejo/Carquinez Heights traffic: Detour to northbound Highway 29 (Sonoma Boulevard) Make a right turn onto Lemon Street Continue on Lemon Street and make a right turn at Curtola Parkway/Lemon Street to merge onto eastbound I-780 Continue on eastbound I-780 and stay in the left lane Take exit 7B to merge onto southbound I-680 Continue on southbound I-680 Take exit 53 to merge onto westbound Hwy. 4 Continue on westbound Hwy. 4 Take exit 1B to merge onto westbound I-80 Local detour map for motorists traveling westbound from Sacramento (Caltrans) Limited Highway 101 access in San Francisco Starting Friday at 11 p.m., Caltrans will close two lanes in each direction of the Highway 101 Bayshore Freeway (Hospital Curve) area in San Francisco and expects to keep them closed until 6 a.m. Monday. The impacted portion of Highway 101 will be between Cesar Chavez and 17th streets so Caltrans can work on Hospital Curve rehabilitation, which is part of a longer-term project that started in 2025. Another closure is planned for Sept. 4-7. How to avoid Highway 101 traffic Caltrans is suggesting Interstate 280 or public transportation as an option as they shutter the lanes to work on the median near Hospital Curve. Bay City News contributed to this report. San Francisco 17 hours ago Major construction projects in the Bay Area to impact weekend traffic Transportation Jul 20 Caltrans releases Bay Area transit plan to improve access on state highways ...read more read less