I-25: Downtown Denver to US 36

The I-25 Central Express Lanes are two reversible lanes between US 36 and downtown Denver, and are barrier-separated from the general-purpose lanes. Depending upon time of day, the I-25 Central Express Lanes in downtown Denver can connect to both the North I-25: US 36 to 120th Avenue Express Lanes and the US 36 Express Lanes.

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How to Use the Express Lanes

These lanes are reversible, running Denver-bound or southbound in the morning and Boulder-bound or northbound in the afternoons. Overhead signage indicates if the lanes are open and the toll price.

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Paying a toll, motorcycles can use Express Lanes where HOV3+ is not allowed. A pass and ExpressToll account are required to avoid higher tolls.

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

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

Corridor Basics

• Lanes are reversible and open at specific times on weekdays and weekends:
  • Weekdays:
    • Southbound lanes are open from 5 a.m. until 11 a.m.
    • Northbound lanes are open from noon - 3 a.m.
  • Weekends:
    • Northbound lanes are open from noon - 3 a.m.
  • 7 miles of Express Lanes from US 36 and 20^th Street in Downtown Denver.
  • The lanes connect to the I-25 North and US 36 Express Lanes.
  • 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.
  • Adjustable toll pricing system used – prices depend on the time of day.
  • Overhead signage indicates current toll prices. Tolls are collected through the vehicle’s ExpressToll account or License Plate Toll.