The Colorado Department of Transportation (CDOT) and the I-70 Coalition have partnered in the Change Your Peak Drive campaign, a multifaceted campaign to improve the I-70 Mountain Corridor by encouraging mountain travelers to change not only the time they drive, but also how they drive. Through public education and strategic partnerships, CDOT and the I-70 Coalition are committed to providing motorists the tools they need to be winter ready and know the resources they have for I-70 information.

Operation TireSafe – Are Your Tires Winter Ready?

Bald or worn tires cannot grip the road and can be extremely hazardous, especially during winter conditions. Find out if your tires are winter ready by taking the Quarter Test:

  • Insert a quarter into the tire tread upside down, with Washington’s head going in first
  • If the top of George’s head is covered by the tread, your tires are OK – do this test at multiple points around each tire
  • If the top of his head is visible at any point around the tire, you need new tires

To encourage drivers to invest in safe tires, CDOT has partnered with tire companies throughout the state to provide deals on a set of new tires. Head to to see all the discounts.

Safety Metering – Learn Why You’re Stopped 

To keep America’s highest vehicular tunnel open for business requires some special techniques by CDOT, one of which is Safety Metering. There are two types of safety metering CDOT uses to keep the Eisenhower Tunnel open: Continuous-Flow Safety Metering and On-Ramp Safety Metering.

Continuous-Flow Safety Metering occurs on the approach to the Eisenhower Tunnel on I-70. An alternating red and green stoplight cycles every four to eight seconds to keep traffic moving consistently through the tunnel, while traffic on the tunnel’s east side slowly dissipates. 

On-Ramp Safety Metering occurs at eastbound on-ramps from Copper Mountain, Frisco, Silverthorne and Loveland. This type of metering may be more familiar, occurring on highway and Interstate on-ramps throughout the Denver metro area.

While drivers may be stopped an average of 20 minutes with Safety Metering, the actual delay is only around 3.5 minutes – this is because eastbound traffic on the other side of the Tunnel is still moving slowly and cars usually quickly catch up with the flow of traffic.

Safety metering is triggered by high traffic, accidents or adverse weather, but with either type of metering, the goal is the same: prevent traffic back-ups in the Tunnel. The Tunnel needs to remain open for emergency vehicles to get through, which allows them to react to and clear the emergency more quickly.

Carpooling – The Real Solution to I-70 Traffic

If every car was filled with at least four people when traveling to the mountains, more than 10,000 cars would be taken off the road each weekend day. Imagine an I-70 with 10,000 fewer cars! 

You can help reduce the traffic by making sure your car is full each time you head to the mountains. Head to to find or create a carpool that heads to your favorite resort! 

Many resorts and towns offer carpooler discounts. Head to to see all the resort benefits.

I-70 Mountain Travel Radio

Tune in for real-time I-70 travel and travel updates every Saturday and Sunday this winter from 6:00 a.m. to 9:00 a.m. and 2:30 p.m. to 6:00 p.m. Listen live through or the CDOT Mobile app.

Bow to the Plow

Plows are the front line to getting our roads clear during winter conditions. Passing or driving too closely to plows is extremely dangerous and can delay their work.  Give plow drivers space for their job so they can get you safely you yours. Show respect for the most important drivers on the road – Bow to the Plow.