London, England Mayor Boris Johnson is retreating from his campaign pledge to end the city's "punishment of motorists." Johnson's predecessor, Ken Livingstone, lost his re-election in large measure because Johnson pledged to scale back the £8 (US $13) fee imposed on motorists entering the downtown area. Johnson announced Friday that he will boost the tax to £10 (US $16.40) to shore up Transport for London's mass transit budget.

"The proposed increase in the charge will ensure that the system remains effective in controlling traffic levels in central London, and the revenue will also help us fund the vital improvements to London's transport network that all Londoners want to see," Johnson said in a statement.

Transport for London data show that the congestion charge has failed in its stated goal of controlling traffic levels downtown. Documented journey times inside the charging zone in 2007 were the same as in 2002, before the tax was collected, according to a 2008 report. Another, independent study found no reduction in pollution within zone. After accounting for £131 million (US $215 million) in overhead, however, the complicated system did provide transit officials with £137 million (US $225 million) in revenue, which came primarily from late payment penalty tickets.

Johnson's latest proposal introduces a transponder-based automated credit card payment system designed to significantly reduce the number of penalty tickets issued. Drivers who chose to use the radio frequency tracking device will also save £1 on the tax.

Last month, Johnson reacted strongly to criticism that he has been dragging his feet on his promise to eliminate the congestion charge's western extension. One of Livingstone's last moves as mayor was to add the boroughs of Kensington, Chelsea and Westminster to the zone in which drivers must pay the £8 fee. Johnson surveyed residents last year of the 28,000 that responded, only 19 percent indicated support for preserving the extension unchanged. Nonetheless, little action has been taken to drop the extension.

"You may have heard the scurrilous rumor that I have reneged on my promise to remove the western extension of the congestion charge," Johnson wrote on his website. "We have to jump through a number of tedious bureaucratic hoops before the axe can fall, but fall it will. The extended zone will be no more. It will be an ex-zone, the area formerly known as. It will be a dead zone!"