The Interstate 680 southbound off-ramp at Marina Vista/Waterfront Rd. is scheduled to reopen Friday morning, October 2 at 6 a.m. The off-ramp was closed for four months to allow removal of the old structure, including a seismic retrofit of the southbound structure over Marina Vista/Waterfront Rd. and replacement of the southbound Marina Vista/Waterfront Rd. off-ramp.