Some traffic jams have no apparent cause — no accident, no stalled vehicle, no lanes closed for construction. There is no easy way out of these maddening messes once you're stuck in them, but a new ...

Being stuck in miles of halted traffic is not a relaxing way to start or finish a summer holiday. And as we crawl along the road, our views blocked by by slow-moving roofboxes and caravans, many of us ...