The PFP Federal High Patrolmen are pretty straight-laced these days. If you get stopped and ticketed, you can go online and see how much your ticket is going to cost. I keep in mind the highway patrol has “instant on” radar and they know how to use it.
Seat belt use is now mandatory on every federal highway in México. Federal Highway patrolmen are frequently stationed just after a cuota toll booth, so buckle up or get nailed. The federal cops are now extremely strict about this law, and they look at every motorist. Fines can run to the equivalent of sixty US dollars or more! Cities and towns frequently have seat belt laws that are strictly enforced and fines there are expensive too.