What color should clearance lamps be towards the rear?

Clearance lamps that are positioned towards the rear of a vehicle must be red. This requirement is in line with safety regulations, which dictate that rear-facing lights need to be visible and clearly identifiable to other drivers, especially under low visibility conditions. The use of red lighting for these clearance lamps helps to indicate the rear extent of the vehicle, enhancing visibility and reducing the risk of collisions.

The choice of red aligns with standard practices in vehicular lighting, where red is universally recognized for signaling the rear position of a vehicle. This convention helps maintain consistency on the road, as drivers expect specific colors for certain functions. The other color options, like amber, green, and white, serve different purposes or are used in different contexts and do not meet the requirements for rear clearance lamps.