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 HOV 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 could result in a violation and up to $250.
  • 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.
  • While it might be tempting to use the Switchable HOV Transponder to avoid paying tolls, it is important to remember there is enforcement on the roadway. Our local law enforcement officers are out on the corridors; violations could cost up to $250.

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

I-25 South Gap

  Monument to Castle Rock
   Open for Testing

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.


The stats are in: Express Lanes are moving people faster in peak travel times. See the numbers.


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