text: Other cities, such as Paris, are fourced to ban driving for days at a time in order to clear the thick smog that hovers above the city. On one day odd numbered plates won't be allowed to drive and on the next day even, volaters are fined $31. As many as 4,000 drivers are fined. Only once the smog was sufficently cleared did they allow both plate types to drive. Limiting driving can prevent problems like this from occuring in all cities.