LONDON - JANUARY 5:  Cars drive past a sign on the M25 motorway informing them of road works due to the widening of the M25 on January 5, 2004 in London. The two-year project will see a seven-mile section of the M25, between junction 12 and junction 15, widened to ten lanes, and the construction of a slip road into Heathrow's new Terminal 5. (Photo by Scott Barbour/Getty Images)