What safety equipment is required when traveling faster than 25 miles per hour while towing?

When traveling faster than 25 miles per hour while towing, having safety chains or brakes capable of holding the trailer if the coupling breaks is a critical requirement. This safety equipment is essential because it provides a backup system to prevent the trailer from becoming detached from the towing vehicle. If the coupling fails, safety chains or a reliable braking system will help maintain control of the trailer, preventing it from swerving unpredictably or causing an accident.

The other options do not provide the necessary safety measures. A spare tire and jack may be useful for tire issues but do not address the risks associated with a trailer becoming unhitched. An emergency flares kit can assist in warning other drivers in the event of an emergency, but it does not prevent an accident related to trailer separation. Lastly, a paid toll receipt is completely unrelated to the operation and safety of towing vehicles. Therefore, the focus on safety chains or brakes is pivotal for ensuring both the safety of the driver and other road users when towing at higher speeds.