text: In Paris, France driving was banned due to smog, not exactly like that, but it was partially banned to clear the air of the city. For example one rule they had was that on monday motorists with even-numbered licence plates were ordered to leave their cars at home and that they next day it would be the odd-numbered plates who would have to follow this rule. Thanks to this little rule congestion was down 60 percent in France's capital and the smog was cleared off.