LONDON, ENGLAND - MAY 26:  London Mayor Boris Johnson launches the 'Summer of Cycling' at Trafalgar Square on May 26, 2009 in London, England. The campaign sets to boost the numbers of people travelling by bike in the capital. New figures released today suggest that there are an estimated 545,000 bicycle journeys now made in London each day, a figure up 9% since Boris Johnson was elected as Mayor.  (Photo by Dan Kitwood/Getty Images)