Older vehicles driving central London now need to meet minimum Euro emission standards lest they face a daily penalty.

Starting last Monday, drivers who venture into the center of London with a vehicle that does not meet emission standards set by the EU will find their wallet lightened by £10.00, or about $13.20. This daily fee will be known as the toxicity levy, or T-Charge.

Sound familiar? It should. In 2003, London introduced a Congestion Charge to discourage people bringing their cars into an already crowded downtown London. That fee currently stands at £11.50, meaning drivers of older machines could be on the hook for £21.50 (nearly $29.00) each day they drive to the center of London.

The new charge is being levied between 7 a.m. and 6 p.m. on weekdays, peak travel times for workers getting in and out of the capital. This T-Charge is the first step towards the establishment of an Ultra-Low Emission Zone (ULEZ) in the center of London by September 2020. The ULEZ will operate 24 hours a day, 7 days a week within the same area as the current Congestion Charge zone.

Diesel, once a rampantly popular choice for powering engines in Europe, has been getting a rough ride over the last few years, hindered by the Volkswagen scandal and increasingly tighter emission requirements for new vehicles in Europe.

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The T-Charge aims to improve air quality in London, in particular with regard to nitrogen dioxide (NO2) and particulate matter, both of which have an adverse effect on human health. Around half of emissions of oxides of nitrogen (NOx), which contribute to increased levels of NO2 come from transport.

Penalties for failing to pay the levies are steep, starting at £65 (about $85) if drivers cough up their missed payment in 14 days. Take longer than that, and they’ll be on the hook for twice that amount. Enforcement will use the same cameras already in place to track road users who pay the congestion charge.

Transport for London, the regulatory body managing the fees, could rake in nearly £65,000 (almost $85,000) per day if the estimate of 6,500 dirty cars entering the center of London is even close to correct. Conservatively, this new charge could take in more than $20 million over the course of one year.

Officials won’t just sit on that sum, of course. Plans call for the money to be put towards the improvement of public services and initiatives to clean up London’s air quality. It has been reported by the World Health Organization that 7.9 million Londoners (nearly 95 percent of the population) live in areas exceeding the WHO guidelines on toxic air quality particles.