The Seattle Department of Transportation (SDOT) will open two major streets in the Mercer Corridor to two-way traffic this spring: Mercer Street between First and Ninth avenues North, and Roy Street between Queen Anne and Fifth avenues North.

Construction to extend two-way Mercer Street from Ninth to First avenues in Uptown began in April 2013. Over the last year, crews have completed demolition and substantial reconstruction of the state Route 99 bridge over Mercer Street, relocated utilities between Fifth and Ninth avenues and completed streetlight upgrades, signal installations and pedestrian improvements between Queen Anne and Fifth avenues.

Beginning in late April, crews will begin converting Mercer Street, Roy Street and Queen Anne Avenue North to two-way traffic. The transition to two-way traffic will occur in three phases:

·The first phase will include shifting the two eastbound Mercer Street traffic lanes onto their permanent location on the south side of the roadway between First and Fifth avenues and installing channelization for the new westbound traffic lanes.

·At the end of this initial phase, traffic signals will activate, and Mercer Street will open for two-way traffic starting at First Avenue and working toward Fifth Avenue over a period of several days.

·The second phase will include converting Roy Street between Queen Anne and Fifth avenues to two-way traffic. During this conversion, westbound Roy Street will reduce to one lane while final channelization is put into place. Signals will activate for two-way traffic on Roy Street starting at Fifth Avenue and working toward Queen Anne Avenue over a period of several days.

·The final phase of the transition will include opening Mercer Street to two-way traffic between Fifth and Ninth avenues, as well as the permanent closure of Broad Street in late May or early June. 

The closure of Broad Street allows for additional space to widen Mercer Street to the south at Dexter Avenue North and continue work associated with the Alaskan Way Viaduct Replacement Project.

Throughout and after the roadway transition, construction impacts will be monitored and will include:

·Monitoring traffic flow and adjust signal timing as conditions change throughout the corridor;

·Uniformed police officers stationed at key intersections to facilitate traffic flow; and

·Additional signage and alternate route information will be available in advance.

After opening Mercer Street to two-way traffic between First and Ninth avenues, construction will continue on Mercer Street between Fifth and Ninth avenues, including the intersection of Mercer Street and Dexter Avenue, through mid-2015. The final configuration of Mercer Street between Fifth and Ninth avenues will feature three lanes of traffic in each direction, widened sidewalks and a bicycle path on the north side of Mercer Street between Dexter Avenue N and Fifth Avenue N. 

For more information, visit the project website: www.seattle.gov/transportation/mercercorridor.htm.