Interesting that you mention the hoy no circula, we are in Ciudad Satélite which is in the State of Mexico, and is part of greater Mexico City on the North West area, we have vanity plates on both vehicles and can not drive on Fridays and Saturdays and are restricted from driving before eleven o'clock Sunday to Thursday, it is a little late now, tomorrow I will get my niece to call the agency and get the scoop on this, specially if gringos are considered in this category, if caught driving on a restricted day, and if it happens to be a woman cop the vehicle's will be impounded, the men are easier to bribe so they have women cops and they are nasty and I have been warned not drive on those days.
So tomorrow I will have good information for you.
navegator