From the Colorado Dept. of Transportation:
The last major summer holiday is nearing and that means motorists can expect more vehicles on Colorado highways. In general, traffic volumes increase about 10 percent during the summer months including over the Labor Day weekend. Typically, Friday tends to be the busiest travel day of the holiday weekend with steady traffic volumes the remainder of the weekend.
The heaviest traffic volumes during the weekend are expected on I-70 from Summit County to Denver as motorists head to the high country for the weekend. Last year, 164,535 vehicles traveled through the Eisenhower Tunnel during the holiday weekend. The peak travel time for westbound I-70 will be on Friday, September 2nd from approximately 1 p.m. to 8 p.m. The heaviest travel time for eastbound I-70 will be on Monday, September 5th from 11 a.m. to 8 p.m.
“The traffic volumes at the Eisenhower Tunnel give us a good perspective on travel patterns for the entire state during the holiday weekend” said Colorado Department of Transportation Executive Director Don Hunt. “To minimize delays during the holiday weekend, CDOT will suspend all construction projects, but motorists are encouraged to plan ahead and avoid the peak travel times.”
You can plan your trip or check current traveler information by visiting www.cotrip.org or calling 511. You can also sign up for e-mail and text message alerts by visiting www.coloradodot.info and clicking on the cell phone icon in the upper right corner under the search function. Once on the sign-up page, you can select the lists that pertain to your travels and interests.