Towing a trailer adds a whole new dimension to driving. Whether you're moving equipment, going on a camping trip, or hauling a caravan for a holiday, towing safely requires attention to both legal rules and driving best practices. One of the most crucial factors is understanding the speed limits for a car towing a trailer, especially on motorways where higher speeds and faster-moving traffic can turn mistakes into hazards.

This blog breaks down the key speed regulations, safety precautions, and other important considerations when towing a trailer on the motorway. Whether you're a seasoned driver or towing for the first time, this guide will help you stay compliant and safe on the road.

Legal Speed Limit for Towing on Motorways

In the UK, the maximum speed limit for cars towing a trailer on a motorway is 60 mph (96 km/h). This limit also applies to dual carriageways. It’s important to note that even though cars without trailers can drive up to 70 mph, that extra 10 mph is not permitted when a trailer is attached.

Key Points:

60 mph is the legal motorway limit for towing.

Exceeding this can lead to fines, penalty points, or even disqualification.

Trailer-towing vehicles are not allowed in the outside (fast) lane of a motorway with three or more lanes.

Why the Speed Limit is Lower

Towing significantly affects a vehicle’s dynamics. Acceleration, braking, and cornering all change when there’s additional weight hitched to your vehicle. Lowering the speed limit for cars towing a trailer is a safety measure to:

Reduce stopping distances.

Prevent trailer sway or fishtailing.

Minimize the risk of jackknifing in emergencies.

Improve overall stability at high speeds.

Understanding Your Vehicle and Trailer Combo

Before hitting the motorway, it’s essential to ensure your vehicle is suitable for the trailer you're towing. You should check:

Gross Train Weight (GTW): This is the maximum combined weight of the car and trailer. Exceeding it is illegal and unsafe.

Tow bar and hitch condition: These should be properly rated and securely fitted.

Braking system: Trailers over 750 kg must have their own braking system.

Lights and signals: All lights must be fully functional and synced with the car.

Driving Tips for Towing a Trailer on the Motorway

Towing safely is more than just sticking to the speed limit. Here are some best practices:

Keep your distance: Leave more room between you and the car ahead than usual. Towing increases braking distance significantly.

Use mirrors effectively: Ensure your mirrors provide a clear view around the trailer.

Avoid sudden maneuvers: Lane changes, sharp turns, and quick stops can cause trailer instability.

Stay in the correct lane: Do not drive in the outer lane of a three-lane motorway while towing.

Check the weather: High winds can make towing more dangerous, especially for taller trailers.

What Happens If You Speed While Towing?

Speeding while towing not only risks your safety but also carries legal consequences. If you’re caught exceeding the 60 mph limit:

You may receive a fine of up to £100.

Three penalty points can be added to your driving license.

You risk invalidating your vehicle insurance in the event of an accident.

Moreover, if the trailer is poorly loaded or the speed causes instability, you could be charged with dangerous driving, which carries more serious penalties.

Trailer Towing Safety Checklist

Before setting off, use this quick checklist:

 Check trailer coupling and safety chains.

 Test lights, brakes, and indicators.

 Ensure the load is evenly distributed and secured.

 Check tire pressure on both the vehicle and the trailer.

 Pack emergency supplies including a spare tire, jack, and warning triangle.

Conclusion

Understanding the speed limit for a car towing a trailer on a motorway is critical for legal compliance and road safety. Always remember that towing requires a heightened level of attention, awareness, and responsibility. It’s not just about keeping your speed in check but also ensuring your load is balanced, your equipment is up to standard, and your driving style is adapted for the conditions.

Whether you're heading out for leisure or work, proper preparation and adherence to motorway towing laws can make the difference between a smooth trip and a dangerous one.

FAQs

1. Can I tow a trailer at 70 mph on a UK motorway?
No, the maximum legal speed for a car towing a trailer on a motorway in the UK is 60 mph, even if the limit for other vehicles is 70 mph.

2. Is it illegal to use the fast lane while towing?
Yes, cars towing trailers are not allowed to use the outside lane on motorways with three or more lanes.

3. Do I need a special license to tow a trailer?
If you passed your driving test after 1 January 1997, you may need to take an additional test (BE entitlement) depending on the size and weight of your trailer.

4. How do I prevent my trailer from swaying?
Ensure the load is evenly distributed, don’t overload, drive steadily, and avoid sudden steering. Trailer stabilization devices can also help.

5. What is the penalty for speeding while towing?
You can be fined up to £100 and receive three points on your license. In more serious cases, you may face higher penalties or disqualification.