Chaos as runaway dumper lorry with full 17-tonne load & no brakes smashes into 12 cars and sends bus careering off road

A DUMPER lorry with no brakes and a 17-tonne load sparked highway carnage after crashing into 12 cars and bashing a bus off the road. Jaw-dropping footage showed the van speeding downhill before losing control and ploughing into a packed line of traffic without stopping. In the clip, the lorry can be seen rushing down…