I-5 - SR 161/SR 18 Triangle Improvements - Before and After Maps

In 2003 and 2005 the state Legislature allocated $112 million for interchange improvements. This funding falls short of WSDOT’s $215-$235 million estimate to complete the project. As a result, WSDOT is building the project in phases.

Phase one of the project, which includes two new flyover ramps, was completed in summer 2012. These improvements can be seen on the map below.

Phase two has been broken up into five parts, as shown on the second map below. There was savings from phase I, but we need more money for phase II.

Phase 1

New flyover ramps


Project Details   

Project details

Project Timeline   

Project timeline