From the websites linked from each city page on urbanaccessregulations.eu. Watch out for other websites selling stickers and plakettes. They can be around 5 times more expensive than the official sources. Similarly for paying congestion charges. Make sure you use the official sources. These are linked from our website, urbanaccessregulations.eu, together with all the reliable information you need about the scheme.

Diesel: Euro 4(PM) means that the particulate aspect of the set Euro standard needs to be met. This means that a diesel particulate filter can be used to bring a pre-Euro 4 vehicle to meet the Euro 4 standard to enable access into the zone. This means that:

• A Euro 4 diesel vehicle can enter the zone.
• If the zone affects cars or vans, then a Euro 3 diesel car/van can fit a diesel particulate filter to reach the Euro 4 standard, and enter the zone.
• For heavy duty vehicles, diesel particulate filters are often available to bring a Euro 2 or even Euro 1 vehicle to reach the particulate aspect of the Euro 4 standard.

For more information on which countries allow what retrofits, please see our which retrofit is valid page.

Yes, it is valid and legitimate. Unfortunately, for many countries, there is not a more direct way for cities to enforce penalties. So cities like London use private management companies. London uses epcplc, which has bank accounts in each country, to make it easier (and cheaper) for those paying the fines Pay these penalty notices as soon as you can. The cost can increase if you delay paying. Other cities use other comanies. If you are in doubt, check with the city or company website.

Crit'Air is an abbreviation for certificat qualité de l'air = Air Quality Certificate.

The certificate is a round sticker that must be displayed in a prominent position on your vehicle. It is a secure document.
There are 6 different types of certificates.
Each certificate corresponds to a vehicle class defined according to air pollutant emissions.
Older vehicles covered by less stringent emissions standards are not eligible for a certificate.
This website is the official site for issuing Air Quality Certificates.

You can apply for your certificate (€3.11 + franking) here.

For more detailed information go to the official French site.