London's £30 billion subway upgrade program, aimed at easing overcrowding and vital to the success of the 2012 Olympics, is at risk after its leading contractor applied for protection from creditors.

Road closures

Road, cycle and pedestrian routes across the Olympic Park

Preparation works are now underway on the Olympic Park site As part of these works it is essential to close some road, pedestrian and cycle routes on 2 July Details of routes that will be affected are:

The new stadium has a 60,000-seat capacity. Arsenal fans are demanding an end to what they say is match-day transport chaos at the club's new stadium. Supporters complain it can take up to an hour to get away after matches at the 60,000-seat Emirates Stadium. They said a decision not to invest in upgrading Holloway Road and Drayton Park stations had been a mistake.