Depending on the last digit of your car's license plate, there is one specific day every week where it is illegal to drive it.

Trouble-o-Meter
Highly enforced with expensive fines and immediate vehicle impoundment.

Status: still on the books

Why Is This a Law?

Mexico City sits in a high-altitude valley that traps air pollution. In 1989, smog became so toxic the government restricted driving to instantly remove twenty percent of exhaust fumes.

A citizen earnestly dealing with the law: Depending on the last digit of your car's license plate, there is one specific day every week where it is illegal to drive it.