Driving with a trailer

By the end of this topic you can

• You can state the speed limit for any vehicle towing a trailer.
• You can leave a safe following distance for the extra weight.
• You can position for bends, junctions and roundabouts so the trailer clears kerbs.
• You can recognise snaking and respond correctly.
• You can decide whether an overtake is safe with a trailer on.

What you need to know and understand

• Any vehicle towing a trailer, caravan or horsebox is limited to 80 km/h on all public roads, motorways included.
• Where a lower speed limit is posted, the lower limit applies.
• Car learner permit holders may not tow; BE learner permit holders may not use motorways.
• Extra weight means longer stopping distances, so leave a bigger gap.
• The trailer's wheels cut in on bends, so you need a wider line.
• If the trailer snakes, ease off the accelerator gently and hold the wheel steady; do not brake hard or steer sharply.

The 80 km/h rule

Under the 2008 speed limit regulations, any vehicle drawing another vehicle has an ordinary speed limit of 80 km/h on every public road. That includes motorways and dual carriageways where cars may do 100 or 120 km/h. On roads with lower limits, the lower limit applies.

For the general limits that apply to cars, see the site article on speed limits in Ireland. Remember they are maximums: wet roads, wind and a heavy load can all mean you should go slower.

Keeping the combination stable

• Accelerate gently and brake early and progressively.
• Leave a much bigger gap to the vehicle in front than you would in a car.
• Slow down before bends, not in them.
• Expect a push from crosswinds on exposed roads and bridges, and from large vehicles passing you.
• Going downhill, select a lower gear early so you do not build up too much speed.
• Make sure your mirrors show the road along both sides of the trailer; fit towing mirrors if they do not.

If the trailer starts to snake

1. Ease off the accelerator smoothly. Do not brake hard.
2. Hold the steering wheel firmly and steady. Do not try to steer against the swing.
3. Let the speed fall until the trailer settles.
4. When it is safe, stop and check the load, nose weight and tyre pressures, which are the usual causes.

Junctions, roundabouts and overtaking

Take a wider line on left turns so the trailer's wheels do not clip the kerb, and watch your nearside mirror. At roundabouts, allow for the extra length when judging gaps.

Overtaking with a trailer needs a much longer clear stretch of road, because you are slower to accelerate and limited to 80 km/h. If you have any doubt, hold back. When others overtake you, keep your speed steady and ease off slightly if it helps them get past.

Common mistakes

• Driving at the car speed limit on a motorway. With a trailer the limit is 80 km/h.
• Braking hard when the trailer snakes. Ease off gently and hold the wheel steady.
• Cutting left turns too tight. The trailer wheels follow inside the car's path.
• Starting an overtake you cannot finish. You need far more clear road with a trailer on.
• Following too closely. The extra weight makes stopping distances much longer.

Test yourself: Driving with a trailer

Answer each question, then read the explanation. Questions come in a random order each time.

Go deeper

• Speed Limits in Ireland 2026