When discussing the annoying topes with Mexican riders, it was explained in detail and with great patience that the local communities can not afford traffic cops.
Drunk and reckless driving has claimed many family members in these towns, hence they install their idea of what a speed bump is. Even after stopping, some of these barriers touched my bash plate, sometimes hard. You get many opportunities to try different ways to cross them but they vary a lot so you'll need to assess as you arrive at them.
As a side benefit they get the commerce that springs up AT these locations because you have to just about STOP to not cause severe damage to your suspension or underside. You'll find you can buy a wide variety of stuff at the topes. :)
Far as bodily injury goes, nothing hurt me more than a STING RAY
sting at Mazunte beach, Oaxaca.