From 7 p.m. Friday, May 2 to 5 a.m. Monday, May 5, Steilacoom-DuPont Road approaching the new roundabout will close. The roadway will close between Pendleton Avenue and Station Drive. People will detour via Center Drive. See "what to expect" below for more information.
Project overview
This project is intended to help relieve chronic traffic congestion and improve mobility along I-5 near Joint Base Lewis-McChord. Crews will rebuild the Steilacoom-DuPont Road (Exit 119) interchange and extend I-5 HOV lanes to Mounts Road.
What to expect
Around-the-clock closure of Steilacoom-DuPont Road scheduled
From 7 p.m. Friday, May 2 to 5 a.m. Monday, May 5, Steilacoom-DuPont Road approaching the new roundabout will close. The roadway will close between Pendleton Avenue and Station Drive. People will detour via Center Drive. Travelers are encouraged to add more time to help prevent delays. Crews will build key elements of the new roundabout including drainage systems.
Travelers who use I-5 near DuPont should plan for ongoing construction activities, some of which include:
I-5 work
Crews have created a new work zone in the I-5 median. The new work zone allows crews to build new northbound and southbound I-5 HOV lanes.
Work also continues on a new I-5 bridge over Pendleton Avenue. Crews will continue building a new Steilacoom-DuPont Road interchange and a connecting roundabout from Steilacoom-DuPont Road.
I-5 lane closures
Travelers can expect nighttime lane reductions on both directions of I-5. Crews will begin reducing lanes as early at 7 p.m. each Monday through Thursday night between Center Drive and 41st Division Drive. All lanes should reopen to traffic by 4:30 a.m. the following morning.
Ramp closures
Ramps will close no earlier than 7 p.m. and will reopen by 4:30 a.m. the next morning. No more than two consecutive ramps will close at a time. A signed detour will direct drivers to the next nearest on- or off-ramp.
Mounts Road
Crews are building a new traffic signal at the southbound I-5 exit to Mounts Road. The traffic signal will be activated during late 2025.
The project will add HOV lanes to both directions of I-5.
Crews will rebuild the Steilacoom-DuPont Road interchange.The new interchange will connect to Steilacoom-DuPont Road near Pendleton Avenue. Workers will replace the existing at-grade railroad crossing. Crews will build a new bridge. It will carry travelers over the tracks.
