Final answer:
Reflectors should be visibly placed when stopped on a non-divided highway; a corner reflector design sends light back in the direction it came from, enhancing visibility. Place one 10 feet behind, another 100 feet, and an optional third 200 feet behind the vehicle.
Step-by-step explanation:
When stopped on a non-divided highway, it's critical for safety to ensure that your vehicle is visible to other drivers. Reflectors, which often contain a corner reflector design, play a crucial role in this. A corner reflector is constructed with two mutually perpendicular reflecting surfaces, which causes light, such as from oncoming headlights, to be reflected back parallel to the direction it came from. This unique property makes them highly effective for roadside visibility.
This configuration helps to create a buffer zone, providing drivers with sufficient time to recognize the stopped vehicle and react appropriately. Proper use of reflectors, especially under conditions of poor visibility or at night, is an important factor in preventing accidents on highways.