Illuminating highway signs, lights and traffic signals usually requires power from a commercial electrical grid. Remote areas, however, may not have access to this power source.
To better understand the costs and other considerations associated with solar-powered systems, the Minnesota Department of Transportation initiated a synthesis project to evaluate products and their effectiveness and costs, as well as a case study detailing a Minnesota county’s experiences with solar-powered traffic control devices.
Read the synthesis report: Highway Signing and Signal Lighting Using Solar Energy, April 2023
Image source: Minnesota Department of Transportation