I-5/SR 161/SR 18 Interchange Improvements - Stage 2
The I-5/SR 161/SR 18 interchange experiences severe congestion and is classified as a high collision corridor. Constructing new access and rebuilding ramps from SB I-5 to SR 161/S 348th St, a new exit at SR 161/S 356th St, an additional left turn lane from SR 161 to S 356th St, a new auxiliary lane on NB I-5, re-aligning and widening the ramp from NB I-5 to SR 18, re-building the SR 161 bridge over I-5, adding an auxiliary lane on SB I-5, and constructing a direct fly-over ramp from Weyerhaeuser Way to S 348th St will improve mobility and reduce the risk of collisions at the interchange.
 PIN#:  100502B   Project Page
 DOT Region:  Northwest
 Counties:  King
 State Route:  005
 Location:  Federal Way   Locate Project
 Leg Districts:  30
 Program / SubProgram:  Improvement
 Sub-Program:  Mobility
 Sub-Category:  Urban Mobility
 Improvement Type:  Urban Mobility - Interchange New or Rebuild
 Mile Posts: 141.4 to 142.8    
  Project Costs:
Phase From - To Prior 17-19 19-21 21-23 23-25 25-2727-29 Future Total
Preliminary Engineering Dec-12 - Dec-25 1,674,000268,0001,000000001,943,000
  Project Totals:  1,674,000 268,000 1,000 0 0 00 0 1,943,000