London’s much-discussed T-Charge for heavily polluting vehicles will go into effect on October 23, 2017, and force select drivers to pay £21.50 ($28) a day to drive in the center of the city during peak times.

The charge will hit pre-Euro 4 petrol and diesel engines, meaning most cars registered before 2005. It will be enforced between 7am and 6pm on weekdays and is expected to impact about 10,000 vehicles that use London’s inner-city streets.

Alongside passenger cars being hit with the T-charge, any pre-Euro 4 coaches, buses and lorries will have to pay £100 ($131) a day.

In a statement, London mayor Sadiq Khan said “The air in London is lethal and I will not stand by and do nothing. Today I’m announcing bold proposals which are critically needed to safeguard Londoners from our air quality health crisis.”

In April 2019, Khan ultimately wants to introduce an Ultra Low Emission Zone in London which would force motorists of pre-Euro 4 vehicles to pay a fee to drive in London, no matter the time. If this plan goes ahead, London will have the toughest emission standards of any major city.

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