Lane Restrictions on Columbia Street between 1st and 2nd Avenues for 2-way Transit Corridor Project begins December 11

SEATTLE – The Seattle Department of Transportation (SDOT) advises travelers that Columbia Street will be reduced to two travel lanes between 1st and 2nd Avenues beginning Monday, December 11 until June 2018, for the Columbia St 2-way Transit Corridor Project. This work is in partnership with King County Metro in preparation to convert Columbia St from a 1-way street to a 2-way transit pathway. Work includes complete street reconstruction to accommodate buses, new signal poles, and curb line changes. This work is weather-dependent and subject to change. 

From 7 a.m. to 5 p.m. daily beginning Monday, December 11, until June 2018, travelers can expect:

  • Columbia St will be reduced to two travel lanes between 1st and 2nd Avenues
  • Westbound Columbia St traffic will be rerouted between 2nd and 3rd Avenues
    • Signed detours will be in place
    • Two traffic lanes will be maintained around the work zone
    • Local access will be maintained
    • Pedestrian access will be maintained
  • There will No Parking or Loading Zones in the work zone during construction
  • Vehicles travelling on Columbia Street may experience delays near the work zone
  • During weekend closures, Metro buses will use alternate routes. Visit King County Metro for more details
  • Seattle Public Utilities will provide notice of temporary water shutdowns related to replacement of an existing watermain
  • Construction-related noise, dust, vibration, and concrete odor                                                       

For more information on this project, please visit:

If you have questions or concerns, please contact Dan Anderson at

SDOT would like to thank the public for its patience while this work is completed.