There are 6 colours of "pastille", ranging from green for electric cars to grey for older diesels. Vehicles over 20 years old are banned from the city on weekdays between 8am and 8pm (20h).
There is a 2 month period of grace when motorists will be advised to get a vignette from the ministry of environment's web site (cost 4.18 euros), after that a fine of 68 euros will be payable.
The system will be extended to other big cities over the next few years.
