While China is spending billions of dollars on infrastructure such as roads and railways, it is still struggling to keep up with the demands of its booming economy and traffic jams are common.

More than 10,000 trucks mainly carrying coal are stuck in a 120-kilometer (75-mile) traffic jam in the northeastern Chinese region of Inner Mongolia, in the latest dramatic snarl-up on the country's roads.

China’s state television said the highway heading toward Beijing and the neighbouring province of Hebei was now more like a car park. The jam started forming on Tuesday after traffic restrictions began being enforced in Hebei, it added.