US 36 Express Lanes Project Colorado, United States

The US 36 Express Lanes Project completes improvements to US 36 in Colorado, a congested two-lane highway connecting the rapidly growing cities of Boulder, Louisville, Broomfield, Westminster, Denver and communities in between.

The Project promotes multimodal transportation strategies that increase travel choices and efficiency for all modes—including general and express lanes, bus rapid transit, bicycling and walking—while reducing emissions and resource use. Now complete, residents have more options for cleaner, safer and less congested travel.

To fit local needs, the Colorado Department of Transportation Enterprise (CDOT) split delivery of the project into two phases. The first phase was procured as a design-build contract, which began initial construction work along the corridor. The second phase was procured as a P3, with Plenary Roads Denver selected as concessionaire to cover design, build, and finance of the Phase 2 construction work.

With construction now complete, Plenary has begun operations and maintenance. In addition, Plenary operates and maintains the existing I-25 Express Lanes segment connecting US 36 to downtown Denver.

The operating and maintenance contract is for 50 years which commenced following construction completion in early 2016. The partnership between Plenary Group and CDOT will see the delivery of an efficient, well-maintained multimodal transportation corridor 20 years sooner than originally planned.