However, during the last years of communist rule (the late 1980s) there was a weird rule: on Sundays people were allowed to use their cars based on how was the first number on the license plate, even or odd.

Cars with license plates starting with an even numbers where allowed to run one Sunday, while the cars with odd numbers were allowed on the road next Sunday; if someone broke the rule (for instance, by driving a car with even numbers on a Sunday when only even numbers license plates were allowed) he/she had the driving license suspended for a few months.

This regulation wasn’t actually aimed at reducing air pollution, the idea was to cut fuel consumption.