Although the Colorado Department of Transportation has its eyes on the future, as seen in its advocacy of the Rocky Mountain Hyperloop project that recently won a global challenge, the agency is also trying to innovate when it comes to current highways. Hence the planned installation of variable speed limit signs in Glenwood Canyon that can either speed up or slow down traffic in response to weather and traffic conditions. VSL has already gotten a tryout near Boulder, and if the system works in Glenwood, among the trickiest sections along the Interstate 70 corridor, after installation set to begin during...