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Overnight lane closures on S 320th St in Federal Way

Publish Date


Sound Transit contractors will close the two westbound lanes of S 320th St in Federal Way overnight.


Monday-Thursday nights 10 p.m. – 5 a.m. for approximately two months starting as early as July 5


Two westbound lanes of S 320th St from I-5 to 21st Ave S


  • Work will occur from 10 p.m.- 5 a.m.*
  • Access to driveways and cross streets will be maintained
  • Traffic in both directions will be maintained
  • Nighttime lighting
  • Cranes and other heavy equipment will be used
  • A safe and secure work site

*Weather dependent

Construction map for South 320th Street lane closure, Federal Way Link Extension