Pollution levels in Paris have reportedly intensified in recent days, leading authorities to announce alternative driving days for even and odd numbered license plates. Drivers found to be driving with the wrong plates will be fined €22.

The new rules, which went into effect Monday morning, aim to cut back Parisian traffic by roughly 50% in order to help clear the air.  Public transportation was also made free on weekend. Exemption from the ban applies to EVs, hybrids, buses, emergency service vehicles and taxis. Drivers will also be spared a fine if they carpool.