Project Info

I-5 - Mounts Rd. to Center Dr. - Auxiliary Lane Extension - Project Map

Mounts Rd to Center Dr Aux lane extension large map
Beginning early spring of 2017, contractor crews will extend the existing northbound Interstate 5 auxiliary lane from Center Drive to Steilacoom-DuPont Road south by 1.5 miles to Mounts Road near DuPont.

View (pdf 399 kb) a diagram showing lane configurations before, during and after construction.

Bicycle Detour
During construction, bicyclists who use northbound I-5 between Center Drive and Steilacoom - DuPont Road will be detoured through DuPont.