Side repeaters, also known as side marker lights, are small lights mounted on the side of a vehicle, near the front and rear wheels. They are designed to improve the visibility of a vehicle to other road users, particularly at night or in poor weather conditions.
By making it easier for other drivers to see a vehicle from the side, side repeaters can help to prevent accidents. They are particularly important for large vehicles, such as trucks and buses, which can be difficult to see from the side.
In many countries, side repeaters are required by law for all new vehicles. They are typically amber or white in color, and must be visible from at least 100 meters away.