What does the vehicle's width light mean?

[AnaMarie]

Vehicle width lights refer to the lamps installed at the highest points of the front and rear of the vehicle, similar to the anti-collision lights mounted on the wingtips of aircraft. They are primarily used during driving in conditions such as dusk, overcast days, rain, or fog to indicate the vehicle's width and height. This helps other vehicles determine their relative positions and sizes during encounters or overtaking. Typically, width lights are white at the front and red at the rear. Literally, width lights serve as a warning, functioning as cautionary signal lights to alert other vehicles. They indicate both the height and width of the vehicle. Safety regulations require vehicles taller than three meters to be equipped with width lights.