Page "Interstate 405 (Washington)" Paragraph 1

I-405 begins as a continuation of Washington State Route 518 ( SR 518 ) at the junction with Interstate 5 in Tukwila and almost immediately after the change to I-405, a High-occupancy vehicle lane begins, and continues to almost the end of the highway.

The freeway continues on an easterly path, passing the newly renovated Westfield Southcenter shopping mall and crossing the Green River before approaching an interchange with SR 181.

After the exit, the former Longacres race track, now owned by Boeing, and new Sounder commuter rail station for Tukwila is passed, and I-405 starts to head north-east towards a cloverleaf interchange with SR 167 and Rainier Avenue, which is the first exit in Renton.

After the interchange with SR 167, the freeway, after a series of infamous s-curves, which become a traffic bottleneck during rush hour, turns to a northerly direction and intersects SR 169 and one direction of SR 900.

A hybrid diamond interchange / partial cloverleaf interchange serves the other direction of SR 900 and the Gene Coulon Memorial Beach Park and a new development called The Landing.