The Mid-Bay Bridge will be closed to all traffic from 11 p.m. tonight until 5 a.m. tomorrow morning as workers continue to make repairs which are expected to be completed by this fall. Drivers will have to use alternative routes during the temporary nighttime closures and traffic on the bridge will remain limited to two-axle vehicles including cars, trucks, SUVs, school buses and limited EMS and first responder equipment only. Semi-trucks and commercial vehicles will be required to use alternate routes.