If you’re traveling on Interstate 70 this summer, please be aware that daily lane closures will intermittently affect traffic just east of Idaho Springs, near the exit for Central City Opera. Additionally, the CENTRAL CITY PARKWAY WILL BE CLOSED JULY 17 & 18 for the Pit Rally Road Race [see below].

For information by telephone regarding road & weather conditions on Colorado’s highways, please call 511 or (303) 639-1111. The specific Twin Tunnels Project Hotline is 303-327-4034.  You can also download the CDOT Mobile App (iTunes or Android) and click “Go I70” or follow CDOT on Twitter or #170West (see the live feed by scrolling below).

Traveling West

Traffic stops may back up before you get to Exit 243 (Central City Parkway). Please plan ahead as there will be NO LATE SEATING until intermission.

  • Alternate Route: From Golden, take Clear Creek Canyon/US-6 west to SR-119 (right). In Black Hawk, turn left (Southwest, in front of Bullwhacker’s Casino) onto Black Hawk/Gregory Street and continue as it changes names to SR-279, Main Street, Lawrence Street and finally Eureka Street by the Opera House.

Traveling East

The interstate detours onto a frontage road around the Twin Tunnels (between Idaho Springs and the Central City Parkway). Please follow the detour signs for Exit 243 and plan ahead as there will be NO LATE SEATING until intermission. East-bound lanes from Empire to the Twin Tunnels are also under construction for the I-70 Peak Period Shoulder Lane Project.

For full information, visit each of the project’s webpages:

If you drive this corridor frequently, you might want to sign up for email alerts regarding road closures.

Central City Parkway Closure: July 17 (8 am – noon), July 18 (8 am – 5 pm)

The main road from I-70 (exit 243) will be closed for the Pit Rally Road Race. Please use CO 119 through Black Hawk during these closures.

Twitter Updates:

You can follow the Colorado Department of Transportation on Twitter. Keep an eye out for tweets mentioning the “Twin Tunnels” project on #I70West.