06/22/2026 | Press release | Distributed by Public on 06/22/2026 13:52
DUPONT - Travelers will notice the opening of new Interstate 5 high occupancy vehicle lanes in the DuPont area. The northbound diamond lane extension allows people to pick up the new HOV lane at Mounts Road. The new southbound I-5 HOV lane extends beyond Steilacoom-DuPont Road.
HOV lanes prioritize the movement of people over vehicles and encourage commuters to carpool or use transit. This is the third Washington State Department of Transportation project related to widening I-5 and creating new HOV lanes between DuPont and Lakewood.
While working to reduce congestion, the project also helps improve mobility for people who travel between DuPont and Joint Base Lewis-McChord.
Improvements include:
As crews finalize the project, travelers are encouraged to check WSDOT's Travel Center Map for information about lane and ramp closures.