In Minnesota and across the country, the most common traffic signals are those that are actuated by a device embedded in the road that detects the presence of a vehicle at the intersection. While these embedded devices can last for decades, they don’t always detect modern vehicles, such as electric cars, or vulnerable road users, such as bicycles or motorcycles. New research evaluated the performance of video- and radar-based detection systems, which are becoming more readily available, under a variety of Minnesota weather conditions.