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Mercer Corridor Project, SR 520 and Alaskan Way Viaduct Update
Mercer Corridor Project
We remain in an active period of road construction around Seattle Center. Travelers are experiencing road changes associated with the Mercer Corridor Project. Please take into account the following as you route your way to and from Seattle Center, and allow extra time in your travels during this critical period of transition on our roadways.
5th Ave. N. Garage:  Harrison St. and Republican St. entrances/exits remain open, with access from northbound and southbound 5th Ave. N. Mercer Garage:  3rd Ave. N. and 4th Ave. N. entrances/exits remain open (4th Ave. open for parking permits and McCaw Hall events). Please take advantage of the designated left turn lane from eastbound Mercer St. onto 4th Ave. N. as an alternative to accessing the garage at the 3rd Ave. N. entrance. 1st Ave. N. Garage:  Entry to this garage is from 1st Ave. N. only. There are two exit lanes onto Warren St. N. and one to 1st Ave.N.

Monday – Thursday, 8pm-6am, through mid-April:  southbound Dexter Ave N will be restricted to
one lane between Roy and Mercer streets.
Friday, April 17 beginning at 8pm - Monday, April 20 at 5am:  Dexter Ave. N will fully close between Aloha and Harrison streets. Westbound Mercer St. will be reduced to one lane between 9th Ave. N and 6th Ave. N from 9pm Friday to 11am Saturday. Eastbound Mercer St. will be reduced to two lanes between 9th Ave. N and 6th Ave. N from 11:30pm Friday to 11am Saturday.
Police officers will be stationed on the Dexter detour route to help facilitate traffic flow. Alternate routes during the closure may be found at: http://www.seattle.gov/transportation/mercer_maps.htm
Saturday, April 18 at 10pm to Sunday, April 19 at 7am:  Crews will close the northbound I-5 ramp to Mercer St.
Saturday, April 18 at 11:59pm to Sunday, April 19 at 8am:  Crews will close the on-ramp from Mercer St. to southbound I-5.
Beginning Monday, April 20:  Northbound Dexter Ave. N will be a in a temporary configuration for approximately six weeks as crews continue sidewalk, pavement and signal work on the east side. Please be aware of the vehicle, bike and pedestrian rerouting and carefully follow the directional signage.
April 28 through 2015:  Dexter Ave. N. between Thomas and Mercer Streets will be reduced to one traffic lane and one bike lane in each direction. During off-peak hours, bikes may be directed to merge with vehicle traffic.
Through Spring 2015:  5th Ave. N. between Harrison and Broad streets will be restricted to one lane in each direction weekdays, from 7am/9am-3pm. The north sidewalk at 5th and Broad will be restricted for pedestrians. Please follow pedestrian detour signage. 
Through Spring 2015:  Mercer St. between 5th Ave. N. and 9th Ave. N. will be restricted weekdays, 9am-3pm. A minimum of one lane in each direction will be maintained at all times.
Through June 30, 2015:  Work continues on the Elliott Bay Seawall between Pike and Madison streets,  temporarily closing businesses on Piers 54, 55 and 56, removing on-street parking west of the viaduct and shifting ferry access to the south of Madison St. Learn more at: http://www.waterfrontseattle.org/seawall.
Through winter 2015:  Only one lane in each direction of Dexter Ave. N between Thomas and Roy streets remains open. Harrison St. is closed between SR-99 and 8th Ave. N. A separate bike lane is maintained on Dexter Ave. N during peak commute hours. Cyclists might be directed to merge with traffic during off-peak hours. Street parking is closed in the work zone, and Metro bus stops are relocated to near Thomas St.
POSTPONED:  planned lane closures on SR-99 between Valley St. and the Aurora Bridge, previously scheduled to begin on Wednesday, March 11.
If roads around the Mercer corridor are congested, consider other options to access I-5 and SR-99 using entry points south of Seattle Center along 2nd Ave. and 5th Ave. More information about alternate routes during construction may be found at: http://www.seattle.gov/transportation/mercercorridor.htm 
Until SR-99 Tunnel opens to traffic:  6th Ave N is closed between Thomas and Republican streets. Harrison St. is closed between Aurora Ave. N and Broad St. Republican St. is closed between Aurora Ave. N and 6th Ave N. 
For the SR-99 tunnel project, visit www.alaskanwayviaduct.org or call 1-888-298-5463.
King County Metro at www.kingcounty.gov/metro or call 206-553-3000.
Sound Transit at www.soundtransit.org
Community Transit at www.commtrans.org
Seattle Center Monorail at www.seattlemonorail.com

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