Seven hundred police will be monitoring traffic from early in the morning. If you’re caught in an even-numbered car, you’re liable to a small fine, and you’ll be told to turn back home. There are exceptions for electric and hybrid vehicles, and for cars carrying three or more passengers.
The measure’s been tried once before, in 1997, when it’s claimed it did have a noticeable impact on improving air quality. However for many people in Paris and the suburbs it’s going to mean a day of inconvenience, and delivery companies are already complaining of lost income.
Politically, the stakes are high, because it comes just a week before Parisians start electing their new mayor.