Our system helps car drivers become aware of the presence of cyclists or pedestrians well before they are in line-of-sight, and in poor visibility conditions. Cyclists and pedestrians wear a “cyclist/pedestrian module” in the form of a device that straps to the upper arm. This device acquires the user’s location using GPS and broadcasts it over radio frequency. Cars with the corresponding “automobile module” receive this signal containing the cyclist or pedestrian’s location information. The automobile module then calculates the cyclist/pedestrian’s location relative to the car’s location and displays this information to the driver of the car on a small monitor.