Motoring numbers

100,000,000: General Motors has poured 0million (£49m) into its plant in South Africa to build Hummers - its largest-ever investment in the country.

29: After 29 years, the tidal flow traffic system through East London's twin-bore Blackwall Tunnels has finally ended, replaced by two-way routing.

160: The production total for the Enfield 8000, which was built from 1969-76 - so far, the best-selling British-made electric car ever.

4.19: Average price in pounds paid for parking a car and buying a rail ticket across train network in 2006/7.