Drivers should prepare for traffic delays, as the Montlake Bridge will close to vehicle and foot traffic from 10 a.m. to 4 p.m. on Saturday, May 2, to allow boats to sail through as part of the opening day of Seattleās boating season. The westbound state Route 520 off-ramp to Montlake Boulevard and the left-turn lane of the eastbound SR 520 off-ramp to northbound Montlake Boulevard will also close from 9 a.m. to 4 p.m.