At a nighttime incident on a highway, how should driver/operators set the headlights?

Answer: B — Low-beam setting without flashing

Setting headlights to the low-beam setting without flashing is the recommended practice for driver/operators at nighttime incidents on a highway. This approach helps ensure visibility for the operator without blinding other motorists or emergency responders working at the scene. Low beams provide sufficient illumination of the immediate area while reducing glare for oncoming traffic, thereby maintaining safety for both the crew and the public. Using high beams, even with flashing lights, can create hazardous conditions by impairing visibility for other drivers, which increases the risk of accidents. Turning headlights off entirely may limit the operator's vision and the visibility of the apparatus itself, making it dangerous for both the crew and other road users. Flashing headlights can attract attention but may not provide adequate illumination, which is crucial during nighttime operations. Therefore, maintaining low beams without adding distracting flashing lights is the safest and most effective choice in this scenario.