After nearly three years, the odd-even scheme will be rolled out in Delhi from November 4 to November 15. Under the odd-even scheme, vehicles with odd registration number will be allowed to ply on odd days while vehicles having nameplates with even numbers will ply on even days. Odd-even was first implemented for 15 days from January 1-15 and then from April 15-30 in 2016. This is the third time that the odd-even scheme will come into force in Delhi.