Figure 2 from the SR 509 Completion Project environmental documentation compares the FEIS Preferred Alternative (Alternative C2) with Phase 1 improvements along SR 509 near Sea-Tac Airport. The diagrams detail new and existing roadway lanes, interchange types (including half-diamond, stretched diamond, and single-point urban interchanges), auxiliary lanes, braided ramps, HOV direct access, a toll point, the Lake to Sound Trail, and street realignments between approximately S. 188th Street and S. 320th Street.Open full document
Notes
Figure 2 from the SR 509 Completion Project environmental documentation compares the FEIS Preferred Alternative (Alternative C2) with Phase 1 improvements along SR 509 near Sea-Tac Airport. The diagrams detail new and existing roadway lanes, interchange types (including half-diamond, stretched diamond, and single-point urban interchanges), auxiliary lanes, braided ramps, HOV direct access, a toll point, the Lake to Sound Trail, and street realignments between approximately S. 188th Street and S. 320th Street.
