ULTIMATE INTERSTATES

SEATTLE & TACOMA



GENERAL INFORMATION & MAP

Oregon and Washington would see a number of interstate improvements. The map below shows these various improvements. Solid Blue Lines indicate new free and purple indicates toll interstate routes. Dotted lines show additional Proposed routes or alternative routes. Red lines show existing Interstate highways. Click on a shaded region below to view more detailed information about interstate ideas for that area

Interstate 490
Description This would upgrade WA-18 to interstate standards connecting I-5 to I-90. This route would be numberes as ultimate interstate 490.
Purpose and Need To allow continuity with the interstate system and provide an additional bypass from I-90 for traffic heading to and from Tacoma, Olympia, and points south.
Interstate 605
Description This would designate the planned extension of WA-167 from Puyallup to Tacoma to interstate standards connecting I-5 to ultimate interstate 805. This route would be numberes as ultimate interstate 605.
Purpose and Need To allow continuity with the interstate system.
Interstate 805 Bypass
Description This would designate WA-167 from I-405 to Puyallup and WA-512 from Puyallup to I-5 as ultimate interstate 805 upgrading some interchanges along the route to allow for more continuity along the route.
Purpose and Need To promote interstate continuity and provide an additional southern bypass around Tacoma. while also linking cities like Puyallup to the interstate system.
Interstate 905 - Bremerton Spur
Description This would designate WA-16 from I-50 in Tacoma to Bremerton and WA-3 from Bremerton to I-405 to Puyallup and WA-512 from Puyallup to near Poulsbo as ultimate interstate 905. a new bridge or link would need to be built near Gorst to connect the two sections of freeway together.
Purpose and Need To facilitate further expansion of the interstate system onto the olypmic peninsula and the west side of the Puget Sound.