The Delhi Government decided that as the pollution level in Delhi have shown a dramatic increase in the level of PM 2.5 and PM 10 since Diwali, it decided to start a new policy of odd-even in Delhi to bring it down. According to this, cars who have last number of the registration number odd will run on odd dates and those ho have even will run on even days. On Sundays, cars can ply freely. Cars driven by women and having a patient were given an exempt. Cars running on CNG were also exempted .