I-25: Berthoud to Fort Collins

I-25 North Express Lanes: Johnstown to Fort Collins

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The I-25 Berthoud to Fort Collins Express Lanes were constructed as part of the “I-25 North” series of projects. This portion of the project included the construction of 14 miles of northbound and southbound Express Lanes with a HOV 3+ option from CO 56 in Berthoud to just past Prospect Road in Fort Collins.

Starting Oct. 29, 2026, the Express Lanes on I-25 between Berthoud and Fort Collins will begin using dynamic tolling. This means the price to use the Express Lane will change based on real-time traffic levels. When traffic is heavier, prices go up to help keep the Express Lanes from getting congested, so drivers who choose to use them can still count on a faster, more reliable trip. 

The price will always be displayed before you enter the Express Lane. The price displayed upon entry into an Express Lane is the price drivers pay, even if tolls change when the vehicle is in the Express Lane.


Toll Rates button
Globeville and Elyria-Swansea Tolling Equity Program
I-25 North Express Lanes Project Fact Sheet

How to Use The Express Lane

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Tolled Vehicle Icon

Vehicles with one to two people pay a toll to use the Express Lanes with an ExpressToll account or through a License Plate Toll.

HOV ICON

HOV3+ users must have an ExpressToll account, a Switchable HOV transponder set to “HOV” mode, and three or more people in the vehicle to use the Express Lanes for free.

Motorcycle Icon

Motorcyclists can use the Express Lanes for free without a pass.

Bus Icon

Bus and other transit can travel in the Express Lanes.

Corridor Basics

  • Lanes are open 24/7
  • 47 miles (both directions) of Express Lanes from Berthoud to Fort Collins.
  • Motorcyclists can use the Express Lanes for free without a pass. All other vehicles are tolled.
  • HOV 3+ and bus services are available with a switchable HOV transponder.
  • Dynamic tolling system is used — prices depend on real-time traffic levels.
  • Overhead signs will indicate current toll prices. Tolls are collected through the vehicle’s ExpressToll account or a License Plate Toll.
  • The Safety and Toll Enforcement Program is in effect. Sophisticated roadside technology is used to enforce the following rules.
    • No weaving across double solid white lines.
    • Enter and exit through the dashed lines only.