B licence, a 1,500 kg trailer and expired paperwork
Ivana has held a category B licence since 2014. She plans to tow a boat trailer from Zagreb to the island of Krk behind her car. The car’s MAM is 2,150 kg and its kerb mass is 1,600 kg; the trailer’s MAM is 1,500 kg and its actual mass with the boat is 1,350 kg. The combination’s MAM is therefore 3,650 kg. The trailer has its own registration document, but its periodic technical inspection expired three months ago. The towbar was fitted by a friend and has no type-approval plate. Ivana argues that she does not need another licence because the trailer is only 1,500 kg and the car is a normal passenger car. She also says the trailer’s insurance is unnecessary because the car is insured. On the A1 motorway a police patrol stops her.
1. Does her category B licence authorise this combination? Explain using the relevant masses.
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No. Category B can cover a trailer above 750 kg only within narrow limits: the combination’s MAM must not exceed 3,500 kg, and the trailer’s MAM must not exceed the unladen mass of the towing vehicle. Here the trailer’s MAM is 1,500 kg, so it is above 750 kg, and the combination’s MAM is 2,150 + 1,500 = 3,650 kg. That is 150 kg over the B limit. The trailer’s actual 1,350 kg is irrelevant for licensing; the assessment uses the maximum authorised masses.
She therefore needs category BE, which covers a B vehicle with a trailer up to 3,500 kg MAM. The fact that the trailer’s MAM is below the car’s 1,600 kg kerb mass does not save the B entitlement, because the combination MAM still exceeds 3,500 kg. Driving on B alone would be driving without the correct category.
2. Which documents and technical points must be valid before the trip, and what should the police stop mean for her plans?
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The trailer needs valid registration and a current periodic technical inspection. Its mandatory insurance position must be confirmed from the documents; she should not assume the car policy automatically covers an unroadworthy or unregistered trailer. The towbar must be type-approved for the car, correctly fitted and rated for the trailer, with a functioning 7- or 13-pin socket, lights, breakaway cable and coupling. The trailer’s tyres, brakes if fitted, and load restraint also matter.
The expired inspection and the unapproved towbar mean the outfit should not continue. The police stop is not a formality to be argued away: she lacks the category, the trailer is not roadworthy on its documents, and the towbar is not demonstrated as suitable. The correct plan is to leave the trailer, arrange a BE-licensed driver or recovery, and have the towbar and trailer inspected and registered before another attempt.
3. If she obtains BE and repairs the paperwork, what limits still apply to this combination on the road?
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BE removes the 3,500 kg combination ceiling and the trailer-versus-kerb-mass rule, but it does not remove speed, weight or equipment limits. The car’s GVW, rear-axle limit, towbar limit and nose-weight limit still apply, and the trailer must not exceed its 1,500 kg MAM. The actual 1,350 kg load must be distributed so the nose weight and axle loads are within limits. A car towing a trailer is subject to the lower speed limit for combinations, so the motorway’s general limit cannot be used. The trailer’s brakes, lights, tyres, breakaway cable and coupling must be serviceable, and the load must be secured. She should also check that her insurance covers the combination and that the trailer’s registration and inspection remain valid for the journey.