London's Transport Commissioner, Peter Hendy, says that the capital's road network really needs investment - as the recent problems with the Hammersmith Flyover demonstrate.
But Labour London Assembly member Val Shawcross argues that the capital's 10 year transport plan is going in "the wrong direction".
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His top speed is believed to be the highest ever recorded in the UK by a rider carrying a pillion passenger.
The mayor took time out from City Hall to join Conservative party workers handing out leaflets in Uxbridge and South Ruislip.
No matter where you look, London's population is getting older - with the exception of one of the capital's boroughs.