Express Lanes

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Understanding & Using Express Lanes

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

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

Geat an ExpressToll pass

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 $1,000 fine.
  • 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 Lane Map

Click map to enlarge

US 36 from Denver to Boulder

I-25 to Wadsworth Blvd

Westbound I-70 Mountain Express Lane

I-70 from Empire to Idaho Springs

Central I-25 from Downtown Denver to US 36

I-25 North from US 36 to 120th Avenue

I-25 North from Johnstown to Fort Collins

I-25 South Gap: Monument to Castle Rock

Central 70

Express Lanes Master Plan

Express Lanes Testimonials

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"It is so exciting to see the major components of this project on my daily commute... ."
— Debra Baskett

Read Debra's story.

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"Although I was initially skeptical about the benefits of the US 36 Express Lanes project, I have been amazed at how this project has transformed our region."
— Frank Bruno

Read Frank's story.

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"Now that I can use the whole stretch of the Express Lanes, I save over 40 minutes per day! I love the Express Lanes!"
— Meg Collins

Read Meg's story.


Do you have questions about your ExpressToll account?

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

For information about Plenary Roads Denver, please visit


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