McCaslin Loop Ramp to US 36 to Close on Wednesday, Jan. 28

January 27, 2015 - Denver Metro/CDOT Region 1 - SUPERIOR – As part of the US 36 Express Lanes Project, the existing loop ramp from southbound McCaslin Boulevard to eastbound US 36 will permanently close on Wednesday, Jan. 28, at 9 p.m.

This closure is necessary to construct the new eastbound US 36 RTD bus ramp, which will mirror the nearly completed bus ramp on westbound US 36 at McCaslin.

The closure of the loop ramp, shown in red, is part of the phased construction of the Diverging Diamond Interchange (DDI). During this phase of the construction, traffic will yield at a temporary traffic light to make a left turn onto the McCaslin on-ramp to eastbound US 36. When the DDI opens on McCaslin later this year, free-flowing turns will be in place, eliminating the need to stop before turning left and improving traffic flow and capacity at this busy interchange.

The McCaslin DDI will be the third DDI in the state – following one in Grand Junction that opened last year and one in Colorado Springs that will open in mid-2015. Click here for an educational video that describes how to drive a DDI.

The US 36 Express Lanes Project is a multi-modal project that will build an express lane in each direction on US 36, in addition to the two free general purpose lanes. The express lanes will accommodate High Occupancy Vehicles (HOV), Bus Rapid Transit (BRT) and tolled vehicles. In addition, the project is replacing several bridges, building a commuter bikeway, adding BRT improvements, and installing Intelligent Transportation Systems (ITS) for tolling, transit and traveler information, and incident management. Phase 1, from Federal Boulevard to 88th Street in Louisville/Superior, will open to the public in 2015. Phase 2, from 88th Street to Table Mesa Drive in Boulder, will open in 2016.

For more information about the project, please visit or our mobile website at To receive free email updates during the project, click on the cell phone icon in the upper right corner. You can then subscribe to a variety of lists including “US 36 Express Lanes Project.”