Chapter 12: Towing a Trailer

Towing a trailer dramatically changes a vehicle’s handling, acceleration, and braking capabilities. It introduces new risks, such as trailer sway, and requires a higher level of skill and attention from the driver. Understanding the specific equipment requirements and safe driving techniques for towing is essential for preventing loss of control, avoiding collisions, and ensuring the safety of your cargo and everyone else on the road.

This section covers the fundamental knowledge needed to safely and legally tow a light, non-commercial trailer in Rhode Island. It details the required equipment, proper loading procedures, and the critical adjustments a driver must make to their technique when pulling a trailer.

Equipment and Loading

Before towing, a driver must ensure the vehicle and trailer are properly equipped and connected. Using the right gear and loading the trailer correctly are the most important steps in preventing dangerous situations like trailer sway or a detached trailer.

• Hitch: The hitch must be appropriate for the weight of the trailer. Hitches are rated by class; using an underrated hitch can lead to catastrophic failure. The hitch ball size must also match the trailer’s coupler size exactly.
• Safety Chains: Two separate safety chains are required to connect the trailer to the towing vehicle. These chains are a critical backup system in case the hitch fails. They should be crossed under the trailer tongue in an “X” pattern. This cradle formation can prevent the tongue from dropping to the pavement if it detaches. The chains should have enough slack to allow for sharp turns but not so much that they drag on the ground.
• Lights: The trailer’s lighting system must be connected to the tow vehicle and be fully functional. This includes brake lights, taillights, and turn signals that work in sync with the tow vehicle’s lights. The trailer’s license plate must also be illuminated.
• Brakes: In Rhode Island, a separate braking system on the trailer is legally required if the trailer has a gross weight of 4,000 pounds or more. These brakes are typically activated electronically by a controller in the tow vehicle and are essential for stopping the combined weight safely.
• Proper Loading (The 60/40 Rule): The distribution of weight on a trailer is the single most important factor in preventing trailer sway. About 60% of the cargo weight should be placed in the front half of the trailer (ahead of the axle), and 40% should be in the back. This ensures proper “tongue weight”—the downward pressure the trailer tongue exerts on the hitch ball, which should be 10-15% of the total trailer weight.