Travel Forecast & Tips


I-70 is congestion free the majority of the time and traffic is quite predictable, weather and accidents withstanding. Plan to avoid peak travel times, and enjoy a delay-free trip along I-70.  Our weekend travel forecast is updated every Thursday afternoon.

Weekend Travel Forecast

June 23-25, 2017

The mountain weather forecast is stellar for this weekend!

Friday WB – Expect slowing between 1:00 p.m. and 6:00 p.m.  Last year this heavy volume resulted in 20 extra minutes of travel time.

Saturday WB – This weekend the last two years saw 20-30 minute delays between 10:30 a.m. and 3:30 p.m., especially in the Floyd Hill-Idaho Springs area.

Saturday EB- No delays occurred on this day over the last three years.

Sunday EB – Be prepared for traffic to start around 11:30 a.m. and build steadily until late afternoon.  Delays will peak between 3:30-5:00 and traffic should return to posted speeds around 6:30 p.m.  Barring an accident, the delays should not be significant.

Enjoy your weekend!

*The Travel Forecast is based on historical data, along with an estimation of how weather, construction, public events and other factors might impact travel.

Tips for I-70 mountain travel

Summer Traffic Patterns

(mid-June through mid-September)

Friday Westbound
– There are occasionally moderate delays heading westbound on Friday evenings. Traffic may build between 2:00-3:00 p.m., peak around 4:00 p.m., and end between 6:00-7:00 p.m. These delays might mean an added 20 minutes to a trip from Golden to Vail.

Saturday and Sunday westbound – traffic is well-distributed westbound on weekend mornings. The exception to this is the Saturday of Labor Day Weekend where up to 20 minute delays may occur from 10:00 am-3:00 pm.

Saturday eastbound- Saturday eastbound traffic tends to be much lower in volume than Sunday. It is spread out enough that, barring an accident, there is not much congestion.

Sunday eastbound – According to historical data, in June/July the traffic starts to build between Noon and 1:00 pm, but in August the pattern is for congestion to start by 11:00 a.m. The peak of traffic is consistently at 4:00 pm all summer long. With folks trying to enjoy every bit of daylight in the mountains, the traffic typically doesn’t diminish until sometimes 7:00-8:00 p.m. Consider staying in the mountains for dinner, or spend Sunday night and head back to the Front Range early Monday morning.

Holiday Weekends – when a national holiday falls on a Monday, you can count on Monday afternoon EB traffic to mimic a typical Sunday pattern, but with potentially more volume. On the flip side, the Sunday of holiday weekends tends to have minimal congestion.

Metering - Traffic metering goes into effect during very high volume times at the Johnson/Eisenhower Tunnels.  This process involves controlling the flow of traffic eastbound into the Eisenhower Tunnel, so traffic does not back up in the tunnel.  It is done for safety reasons so emergency vehicles can have access to the tunnel in case of an accident, a fire, etc.

Weather- In the summer, weather plays a larger factor in traveler behavior. If rain showers move in early in the day, expect drivers to head back to the Front Range early as well.

 Check one of CDOT’s Real Time Info resources and plan accordingly and avoid the jam!