Express Lanes

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Understanding & Using Express Lanes

Improving roadways is critical to meeting the transportation needs of Colorado, one of the top five fastest-growing states in the country.

Using Express Lanes is easy and provides travelers more reliable, predictable travel times. Travelers are never forced to pay a toll.

To use any Colorado Express Lanes, you will need an ExpressToll account and pass to avoid a higher toll. The Switchable HOV3+ Transponder is the only pass that allows you to choose the carpool option.

Express Lanes Safety Tips 

  • Speed limits apply to the Express Lanes as well as the general purpose lanes. Motorists should not exceed the posted speed limits when using the Express Lanes.
  • Express Lanes should be entered and exited through the dashed line only. Weaving in and out of the Express Lanes and crossing the double white line will result in a civil penalty and a fine as part of the Safety Enforcement Program.
  • Express Lanes should never be used as a passing lane. Express Lanes are offered next to the free general purpose lanes to provide drivers with a choice and an option of reliable travel time, but it’s not safe to use Express Lanes as a passing lane.

Where Express Lanes Are, Where They'll Be 

Express Lanes Under Construction
Express Lanes Open

US 36

   Denver to Boulder


 I-25 to Wadsworth Boulevard

Westbound I-70 Mountain

  Idaho Springs to Empire

Eastbound I-70 Mountain

  Empire to Idaho Springs

I-25 Central

  Downtown Denver to US 36

I-25, US 36 to E-470

  US 36 to E-470 / Northwest Parkway

I-25 North

  Berthoud to Fort Collins
      Open for Testing

I-25 South Gap

  Monument to Castle Rock

Central 70

  I-25 to Chambers Road


Do you have questions about your ExpressToll account?

Please call ExpressToll Customer Service at 303-537-3470, or 1-888-946-3470.


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