Guardian: When you next find yourself gnawing on your steering wheel as the vehicles ahead of you concertina into a wall of metal, spare a thought for the drivers currently stuck in one of the longest traffic jams in history. Thousands of drivers on the Beijing-Tibet Expressway just outside the Chinese capital have been snared by roadworks ever since 14 August – and the disruption is expected to last a further month. The tailbacks now stretch for a mind-boggling 100km and 400 police officers …