What is the required placement for warning devices on stopped vehicles on roadways when lights are not used?

The requirement for the placement of warning devices on stopped vehicles is to ensure safety by providing adequate warning to approaching drivers. When a vehicle is stopped on a roadway and its lights are not used, it's important to have these warning devices positioned appropriately to ensure visibility.

Placing one warning device 100 feet in front of the vehicle and another 100 feet behind it is the standard practice. This distance is effective as it provides ample notice to oncoming traffic, reducing the likelihood of accidents. The 100-foot distance is designed to give enough time for drivers to react and make necessary decisions as they approach the stopped vehicle.

Options that suggest longer or shorter distances do not align with the established guidelines intended to enhance safety on roadways. Distances shorter than 100 feet may not provide enough warning, while distances longer than 100 feet might lead to confusion regarding the location of the stopped vehicle. Thus, the correct distance of 100 feet both in front and behind the vehicle is crucial for optimal visibility and safety.