Uniformed police officers will be stationed at the intersection between 9 a.m. and 3 p.m. to help facilitate traffic flow while crews work on the signals.
Once signal work is complete:
•Left turns from Dexter onto Mercer will be allowed.
•Left turns from Mercer onto Dexter will be allowed.
•Right turns from southbound Dexter Avenue onto westbound Mercer Street will be allowed.
•Right-turning vehicles and southbound bicyclists will have separate signal phases, with no right turns on red to reduce conflicts.
Mercer will continue to operate with three eastbound lanes and two westbound lanes between Ninth and Dexter avenues North. Mercer may reduce to two lanes in either direction between 9 a.m. and 3 p.m. weekdays.
Northbound Dexter will continue to operate with one lane between Republican and Valley streets.
Also, as early as Monday, June 29, pedestrians and bicyclists will shift from the north side to the south side of Mercer Street between Fifth and Dexter avenues North. For approximately two weeks, crews will close either the north or south sidewalk on Mercer Street between Fifth and Dexter between 7 a.m. to 4 p.m. to complete construction activities.
A sidewalk on the north or south side of Mercer Street between South Lake Union and the Uptown neighborhood will be maintained at all times.
The sidewalk along the south side of Mercer Street is a shared pathway for pedestrians and bicyclists. Bicyclists should yield to pedestrians and may choose to dismount and walk their bicycles while using the shared sidewalk. To determine which sidewalk will open for a particular day, call the 24-hour construction hotline at (206) 419-5818
More information about pedestrian and bicycle access during construction can be found at www.seattle.gov/transportation/mercer_maps_detour.htm.