Final Paving on McCasli Boulevard Requires Closures on the Bridge and Ramps This Weekend

October 30, 2015 - Denver Metro/CDOT Region 1 - Alternate routes are advised Oct. 31 and Nov. 1 during the paving.

SUPERIOR/LOUISVILLE – The Colorado Department of Transportation (CDOT) will close various lanes and ramps on the McCaslin Boulevard bridge starting at 5:30 a.m. on Saturday, Oct. 31, through 5:30 a.m. on Monday, Nov. 2, for final paving and striping. The closures will take place at the following locations and days.

Saturday, Oct. 31, Ramp and Bridge Closures (attached – shown in red)

  • Southbound McCaslin Boulevard (across the bridge) from Dillon to Marshall Road (northbound access across the bridge will be allowed)
  • Northbound McCaslin to the eastbound US 36 on-ramp
  • Southbound McCaslin to the eastbound US 36 on-ramp
  • Westbound US 36 off-ramp to McCaslin

 Sunday, Nov. 1, Ramp and Bridge Closures (attached – shown in red)

  • Northbound McCaslin (across the bridge) from Marshall to Dillon Road (southbound access across the bridgewill remain open)
  • Northbound McCaslin to westbound US 36 on-ramp
  • Southbound McCaslin to westbound US 36 on-ramp
  • Eastbound US 36 off-ramp to McCaslin 

The bridge was realigned into a Diverging Diamond Interchange (DDI) configuration in late October. Work on the bridge will continue for the next couple of months on ramp paving, sidewalk and median construction, and the bridge arch installation. The bridge is scheduled for completion by the end of this year.   

Drivers can view a video on how to drive the new DDI  The McCaslin DDI is the third in Colorado. The DDI crosses traffic to the opposite side of the road across an interchange so vehicles have unimpeded movements onto the freeway ramps. Left-turn movements, which are a typical challenge with standard four-way interchanges, do not have to cross oncoming traffic in a DDI, helping traffic move more smoothly and increasing safety.

The US 36 Express Lanes Project is a multi-modal project that is building an express lane in each direction on US 36, in addition to the two free general purpose lanes. The Express Lanes 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, opened this past summer. Phase 2, from 88th Street to Table Mesa Drive in Boulder, will open in 2016.

For more information about the project, call 303-404-7042 or go to or our mobile website 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.”