Carpoolers Need Three to Ride for Free on CDOT's HOV Express Lanes

I-25 and US 36 Express Lanes are now HOV 3+

The Colorado Department of Transportation (CDOT) and the High Performance Transportation Enterprise (HPTE) today remind carpoolers that CDOT's High Occupancy Vehicle (HOV) Express Lanes is now HOV 3+.

The change began Jan. 1, 2017. HOV 3+ equals a driver and at least two passengers.

The change affects the US 36 and I-25 Express Lanes (Speer to US 36 and US 36 to 120th Avenue), corridors that offer free carpooling in the Express Lanes. The move to HOV 3+ is needed to provide uncongested travel now and in the future on the Express Lanes, as well as to provide funding to help offset costs of the lane—including operations and maintenance.

CDOT and HPTE are working with the Denver Regional Council of Governments (DRCOG), the Regional Transportation District (RTD), Smart Commute Metro North, 36 Commuting Solutions, North Front Range Metropolitan Planning Organization (NFRMPO), Lyft, Uber and others to help people find and use additional ways to carpool, or take other modes of transportation. To explore different options, visit the HOV 3+ solutions website. Drivers also always have the option of driving in the free general purpose lanes.

Carpool purists—drivers who use their Switchable HOV Transponder in carpool mode only—will be able to receive the $15 transponder for free in spring 2017 as another way to ease the transition. Drivers can get a Switchable HOV Transponder at

Learn more about CDOT's Express Lanes

Express Lanes increase roadway capacity and help to manage congestion on the highways. The use of toll pricing during peak travel times reduces delays, manages congestion and maintains reliable travel times. Express Lanes are currently open on I-25 between downtown Denver and US 36, I-25 from US 36 to 120th Avenue, US 36 between Denver and Boulder, and on I-70 between Idaho Springs and Empire.

About the High Performance Transportation Enterprise (HPTE)

The HPTE operates as a government-owned, independent business within CDOT. It searches out innovative ways to finance projects to help Colorado fulfill its commitment to increase travel choices through options that include Express Lanes, transit, biking, walking and carpooling. Learn more.