Skyline Products Case Study Explores Colorado Department of Transportation’s (CDOT) Use of Skyline Variable Speed Limit Signs for I-70 Glenwood Canyon Corridor Project

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The case study reviews how the installation of Skyline’s LED variable speed limit (VSL) signs along I-70 in the Glenwood Canyon corridor will modify posted speed limits based on road conditions to improve traffic flow and reduce accidents

ITS, VSL Signs

Skyline Products VSL Signs in Glenwood Canyon

Transportation departments throughout the country regularly encounter ITS projects that pose unique challenges. Our team worked with CDOT and Apex Design to fully scope the project, identify any unique challenges, and create a solution that met their needs.

Skyline Products, which produces the industry’s most advanced and reliable ITS-Grade® dynamic message signs (DMS), released today a case study that explores the use of Skyline Products variable speed limit (VSL) signs by the Colorado Department of Transportation (CDOT). The installation of Skyline’s LED variable speed limit signs is part of a project to enhance CDOT’s Intelligent Transportation Systems (ITS) infrastructure along I-70 in the Glenwood Canyon corridor.

A 2011 CDOT speed study revealed that traffic throughout the canyon demonstrated a speed differential of approximately 10 mph between passenger vehicles and commercial vehicles. Considering the grades and curves through Glenwood Canyon, CDOT determined 50 mph as a safe speed for commercial vehicles greater than 26,000 GVWR and 60 mph for cars. When there is an accident, adverse weather conditions, or construction, CDOT lowers the speed limits, keeping passenger and commercial vehicle speed limits the same.

The project required a variable, dual-speed, full-color sign – the top of which displays two digits for cars and below that, two digits for trucks over 26k GVWR. Most standard, off-the-shelf VSL signs show only one speed. By using Skyline’s design-build process, CDOT had the freedom to specify unique needs and requirements for the project. Skyline then designed, engineered, and built a tailored solution that thoroughly addressed CDOT’s specifications – including a single, 10’ tall housing that protects the sign and provides a sleek presentation.

“Transportation departments throughout the country regularly encounter ITS projects that pose unique challenges,” shared Chip Stadjuhar, CEO of Skyline Products. “We take great pride in our solution partner approach. Our team worked with CDOT and Apex Design to fully scope the project, identify any unique challenges, and create a solution that met their needs. Casper Electric installed the signs.”

To learn more about the CDOT I-70 Glenwood Canyon corridor project and their use of VSL signs, read the entire case study.

About Skyline Products
Skyline Products helps transportation professionals solve their most complex traffic flow, parking, and safety problems through custom, engineered-to-order, intelligent transportation systems (ITS). Since 1970, Skyline has invested heavily in research and development to create the industry’s most advanced and reliable ITS-Grade® dynamic message sign systems and software solutions that are Designed to be Bold, Engineered to Last. Much of the ITS industry has adopted and currently specifies innovations that were originally developed by Skyline. Our team of industry experts is ready to design a solution customized to the needs of the project, and our collaborative approach ensures customers purchase the right solution – not just a standard solution. Learn more at SkylineProducts.com.

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Allison Wroe
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