Alternate Routes Required

Typical peak periods of construction and road closures occur during summer months, however a few projects taking place this fall will have an impact on local commuter's travel plans:

Southbound I-5 Onramp at 200th Street 
Detours will be in place during temporary construction forcing closure of the I-5 southbound ramp at South 200th Street / Military Road South for I-5 concrete pavement rehabilitation. Closure will be weather dependant requiring a maximum of 5 single nights between October 10 – November 18, 2011.  Mon-Fri closures will be scheduled from 8PM to 5AM & Sat-Sun 8PM to 10AM.. Detour will be on Military Road South, North to South 188th Street and the Southbound ramp to I-5.

Additional Major Construction Detours in place within the Region:

154th Street between 24th and 32nd Ave South
The City of Seatac recently announced that full road closure of South 154th St between 32nd Ave S and 24th Ave S will continue to remain in effect until December 31st.  During this time only emergency vehicles and local traffic will be allowed to use a portion of South 154th St.  Please refer to the detour map for alternative routes while traveling in this area.

SR 99 - Alaskan Way Viaduct Replacement
A nine-day closure of the State Route 99 Alaskan Way Viaduct will mark the beginning of the end for Seattle’s double-deck highway.  At 7:30 p.m. Friday, Oct. 21, crews working for the Washington State Department of Transportation (WSDOT) will close the majority of the viaduct until 5 a.m., Monday, Oct. 31. 

During the closure, crews will demolish large sections of the southern mile of the viaduct, and complete temporary connections to a new SR 99 bridge now under construction on the west side of the viaduct in SODO. When 99 reopens on Halloween, a “construction bypass” will be in place.  WSDOT has just released this video to provide an example of what this will look like for commuters passing through this area:

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