A length of Riverside Drive in Watsonville is undergoing a major surface upgrade. Through Friday, crews will pave Riverside Drive from Main Street to Blackburn Street. Next week, from July 30 to Aug. 3, crews will pave Riverside Drive from Walker Street to Highway 1, with alternating lane closures. Work hours will be 7 a.m. to 3 p.m. each day. Up to 20-minute delays are expected.