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US 287 & Isabelle Road intersection safety improvement project underway


November 25, 2020

Courtesy Photo

Traffic on westbound Isabelle Road at US 287.

Boulder County Public Works, the Colorado Department of Transportation (CDOT), and Concrete Works of Colorado have started a safety improvements project at the US 287 and Isabelle Road intersection.

Normal working hours are 8 a.m. to 4:30 p.m., Monday through Friday. Weekend work may be necessary over the course of the project. Updates will be posted at http://www.US287Isabelle.com.

Travelers on both US 287 and Isabelle Road can expect lane closures and traffic shifts throughout the project's duration, which is anticipated to end in May. Alternate routes are advised during working hours.

The project will improve safety and traffic flow by reconstructing the intersection and widening Isabelle Road both east and west of the highway. The scope of work includes plans to:

Widen Isabelle Road from 109th Street (Town of Erie) to 800 feet west of US 287

Stripe new buffered bike lanes both east and west on Isabelle Road across the intersection

Lengthen the existing turn lanes on Isabelle Road to reduce conflicts for waiting vehicles and add dual left-turn lanes for westbound traffic

Replace existing traffic signals installed on raised islands with new pedestrian crossings on all four corners

Install improved lighting to improve visibility within the project limits.

Realign the Isabelle Road intersection with 109th Street to improve sight distance for both southbound and westbound traffic.

Construct new wetlands northeast of the intersection to mitigate project impacts and improve wildlife habitat.

Design exhibits are available at http://www.US287Isabelle.com. The project is funded with CDOT Highway Safety Funds and Boulder County's Countywide Transportation Sales Tax that was passed by voters in 2007.

All current Boulder County Transportation project information is available at http://www.BoCoConeZones.com. Or, for more information, please contact Andrew Barth via email or call 303-441-1032.


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