Thanks, I went through a few road demonstration at toll booths without problem. I also give some money and on top it is normally less than the toll anyway. I have seen an armed road block and I do not know what it was for, no police suit or car, not the army, just a bunch of people stopping traffic, this was on road 16 between Chihuahua and Copper Canyon, they just said, gringo, OK, everything was fine.
Looks like from your comments that it will be just about the same in Oaxaca and Chiappas as in the rest of Mexico, just take it cool, go with the flow, adjust to the country spec.
