At night, what must a towed vehicle have at the back of it?

A towed vehicle must have a red light at the back of it at night to ensure that it is visible to other road users. The requirement for this red light is in place to prevent accidents by making the towed vehicle more noticeable in low-light conditions. This is especially crucial as many road users may not see darker objects like a trailer against the night sky, increasing the risk of collisions.

The presence of a red light indicates to drivers behind that the vehicle is stationary or moving slowly, providing them with the necessary warning to adjust their speed or position accordingly. This safety measure is part of broader regulations aimed at reducing hazards associated with towing, especially during nighttime driving when visibility is reduced.