Iain Murray reports on the new London five pound fee (about eight dollars, and enforced by a penalty), charged to each car entering central London. It turns out the fee has been set too high, and traffic has fallen by more than the projected fifteen percent. Nor does the fee appear to be maximizing revenue. Mayor Livingstone wants to continue the high fee, however, because he likes the environmental effects of much lower traffic, despite a serious hit to London retail sales.
By the way, over 100,000 people are refusing to pay their penalty notices.
Addendum: Transportblog.com, an excellent source, offers some follow-up and commentary.