Mexico City brah.
We now have an ordinance that is called 'No Circula' or 'Doesn't transit', which basically means you can't drive your car one day of the week. It is sorted by last digit on your license plate. Mine ends in 2 so I can't use it on Thursdays. If they see your car on the street, its a huge ass fine and they take it to the pound for a couple of days.
A couple of weeks ago air pollution got so bad that they doubled this ordinance and you couldn't drive 2 days of the week (Tuesday, Thursday and the third Saturday of each month). This applies to every car in Mexico City.
Problem is, public transportation sucks and is overcrowded as it is. It got so bad during those days that there were stories of people fist fighting for a cab and so forth, Uber rates were 9.9x times the usual, lots of people missed work, flights, etc. They had to go back to single No Circula.
Good times.