4x4 and trailer operators reminded that tachograph rules apply even with an empty trailer

Drivers using a 4x4 and trailer combination for business or trade purposes are being reminded that tachograph regulations can apply even when the trailer is empty.

Under UK and EU drivers’ hours rules, if the combined plated weight of the towing vehicle and trailer exceeds 3.5 tonnes and the vehicle is being used in connection with a business, trade or commercial activity, a tachograph must be fitted and used correctly.

Enforcement officers say a common misunderstanding is that tachograph rules only apply when the trailer is carrying a load. In reality, once a trailer is attached, the maximum authorised mass (MAM) of the entire combination is what matters, not whether the trailer is loaded or empty.

This means that a typical pickup truck or large 4x4 towing a trailer can easily fall within tachograph regulations, even for relatively small jobs such as transporting tools, equipment, machinery or materials for work purposes.

Failure to comply can lead to:

• Prohibition notices
• Fixed penalties or court fines
• Drivers’ hours offences
• Vehicle immobilisation
• Action against both the driver and the operator

Commercial operators are being urged to check the plated weights of both the towing vehicle and the trailer, ensure the correct tachograph equipment is installed, and keep accurate drivers’ hours records whenever the regulations apply.

Road safety authorities say the message is straightforward: if your 4x4 and trailer combination exceeds 3.5 tonnes and is being used for business, tachograph rules apply from the moment the trailer is connected no excuses.