Boris Johnson, the new mayor of London, has announced that the western extension of the London Congestion Charge will be abolished but not until 2010. The $12-a-day charge was introduced by his predecessor, Mayor Ken Livingstone, and at first, it applied to only the commercial heart of London. In 2007, the downtown area subjected to the charge was expanded to include the largely residential area west of London. The charge cannot be reversed immediately for administrative reasons. Johnson also has dismantled Livingstone’s scheme to increase the congestion charge for cars that emit too much carbon-dioxide, a plan that Porsche fought in court until the new mayor took office.