If you drive a car into central London weekdays between 7:00 am and 6:00 pm, you will pay a congestion charge of £11.50, equivalent to about $15.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/congestion-pricing-cuts-london-traffic-30-now-new-york-city-wants
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/clean-technica
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution-control
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/congestion
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/congestion-pricing
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-kingdom-uk
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cars
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/transport
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/carbon-dioxide
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/new-york
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-states-america-us