According to researchers at the University of Minnesota, most traffic signals in the US are only retimed every two to five years (or longer), largely due to the expense associated with retiming efforts. However, over the past several years, University of Minnesota researchers have developed and refined its SMART Signal system to make it easier and less expensive to retime signals.
The system, developed with funding from the Minnesota Department of Transportation (MnDOT), not only collects traffic and si
