+1 on road hazards. While the roads in Mexico are generally "fast roads" they are also lax in posting/fixing hazards such as potholes, so vigilance is a must. E.g. you are tooling down a mtn. with jungle flowers hanging here & there and all is well & beautiful-but- as you round the curve the road starts an area that gets water from a sidehill in hard rains and the road is covered with gravel or has too many potholes to miss! Not likely to be a sign like USA. Next e.g. is hwy construction, Mexico version,i.e. it may say construction or it may not; also it may have pavement variations that are dangerous. I was mearing Saltillo last year & the pavement was new and as I went down an approach of new pavement it suddenly met more new pavement but the meeting areas of that asphalt didn't blend into each other. The result was an abrupt 6"+ ridge that was enough to turn a bike at the given angle of approach! I was barely able to cut my wheel & stay up! I have also seen bridge expansion joints that were flat out dangerous. These are all common possibles and throw in a few aggressive drivers (I know, we have em too) that pass on blind curves & hills and you get the picture.Also, watch out for the open range cattle,horses goats,donkeys,etc.. That said it is the best riding in the world!