What is the primary purpose of identification lamps on wide vehicles?

The primary purpose of identification lamps on wide vehicles is to indicate the width and position of the vehicle. These lamps are crucial for visibility, especially in low-light conditions, as they help other drivers recognize the overall dimensions of the vehicle. When vehicles are wider than a standard size, identification lamps enhance safety by clearly marking their presence on the road, minimizing the risk of collisions and ensuring that other motorists can safely navigate around them. This function is essential for maintaining road safety and is particularly important for large trucks and trailers that may have an extended profile.