A Hungarian lorry driver has been jailed for four days and fined £2,500 for "one of the most serious breaches of drivers' hours" North Wales Police has seen.
Roland Banfalvi, 38, drove 4,277km (2,658 miles) in a week, and destroyed tachographs showing he had driven further, Caernarfon magistrates heard.
His 38-tonne lorry had defective tyres when stopped on the A55 in Bangor, Gwynedd.
The lorry has been forfeited to police.
When stopped by officers from the Commercial Vehicle Unit on 13 October, Banfalvi produced documents claiming he taken rest periods, when he had driven throughout Europe without taking the required rest since 15 September.
He was sentenced for not taking the required rest breaks and producing false documents.
After the hearing on Friday, Caernarfon, Sgt Ifan Jones of North Wales Police said: "This is one of the most serious breaches of drivers' hours that the Commercial Vehicle Unit has uncovered.
"It is disappointing that hauliers continue to allow tired drivers with defective vehicles to travel on our roads."