What indicates the width and height of a vehicle?

The clearance lamps are specifically designed to indicate the overall width and height of a vehicle. These lamps are mounted on the top or sides of a vehicle and serve as visual markers that help other drivers assess the size of the vehicle, especially in low light conditions or poor visibility.

Clearance lamps are particularly important for larger vehicles, such as trucks and trailers, as they ensure that their dimensions are clear to other road users. This helps to prevent accidents and improve safety on the road. The function of the clearance lamps in conveying the vehicle's height and width is critical, as it allows for better compliance with traffic regulations and helps in negotiating tight spaces.

In contrast, headlamps are primarily for illumination to see the road ahead, tail lamps signal the vehicle's presence to those behind it, and fog lamps are intended to enhance visibility in foggy conditions. Each of these types of lights has a distinct purpose that does not involve indicating the vehicle's dimensions in the same way that clearance lamps do.