Your trailer has begun to snake and swerve. What should you do?

Your trailer has begun… — Gently reduce speed

The answer options

Gently reduce speedCorrect
Speed up
Sharply brake
Steer immediately

Why the other options are wrong

“Speed up” is a distractor. It does not meet the standard the question is testing, which gently reduce speed does. Picking it in the real test costs a mark you cannot get back, and with a pass mark of 43 out of 50 you only have seven to spare.
“Sharply brake” is a distractor. It does not meet the standard the question is testing, which gently reduce speed does. Picking it in the real test costs a mark you cannot get back, and with a pass mark of 43 out of 50 you only have seven to spare.
“Steer immediately” is a distractor. It does not meet the standard the question is testing, which gently reduce speed does. Picking it in the real test costs a mark you cannot get back, and with a pass mark of 43 out of 50 you only have seven to spare.

Why that is the answer

Trailer snaking is usually caused by high speeds or strong side winds. If your trailer sways, ease off the accelerator and gently reduce your speed so the vehicle and trailer can naturally stabilise. Never brake sharply or steer frantically, as this can cause a jackknife or complete loss of control. Speeding up to try and pull the outfit straight is a dangerous misconception that will only make the instability far worse.

What vehicle loading covers

· Driver responsibility for load security and legal weight limits
· Loading a trailer or caravan and the effect on stability
· Stabilisers, breakaway cables and towing mirrors
· Roof racks, roof boxes and the effect on fuel consumption

Mistakes learners repeat on this topic

· Loading heavy items high or towards the rear of a trailer
· Assuming a stabiliser corrects a badly distributed load
· Believing the passenger is responsible for a child's seat belt
· Forgetting that a roof load raises the centre of gravity in crosswinds

Instructor tip: Any snaking-trailer question resolves to slowing down gently — never brake hard or accelerate out of it.

How this comes up in the real test

Questions from vehicle loading appear throughout the 50-question multiple-choice section, and the wording changes between versions. Learn the rule rather than the sentence: the DVSA can ask the same point from the opposite direction, and a memorised answer falls over the moment the phrasing moves.

The pass mark is 43 out of 50, so seven wrong answers is your entire margin. If a whole category is shaky, run the topic practice below until you are getting every question right for the right reason, then go back to full mocks under the clock.

Practise Vehicle Loading Sit a full mock test