The second day of the third edition of the odd-even road space rationing scheme began on a cleaner note as the air quality improved on Tuesday morning. On Tuesday, the vehicles which are having the last digit in Odd numbers including 1, 3, 5, 7, and 9 are permitted. Violators will have to pay fine. Meanwhile, the air quality on Tuesday was much better in comparison to Monday. In several areas, the AQI stood below 500 mark in the 'severe category', while it was still in the 'severe plus' category at a few locations in Delhi-NCR.