K&K Systems’ Sign Alerts™ can be equipped with a motion sensor that is ideal for pedestrian or bike trail crossings and  golf cart crossings. When the motion detector senses movement near the intersection of the trail and the road, the beacons on the road will begin to flash yellow, warning drivers to be cautious at the intersecting trail. At the same time, the beacons on the trail will begin to flash red, indicating for all trail-goers to stop at the upcoming intersecting roadway.