From what I have heard, it is driving at night that may be dangerous. If you leave from Laredo or Brownsville( I think) you can get to Monterrey before dark. After that the danger subsides greatly I think.
On the other hand, why drive. Will you really need a car in Cozumel? Or thinking about touring the Yucatan. Flying down and renting a car might be much more economical and safe.
On the other hand, why drive. Will you really need a car in Cozumel? Or thinking about touring the Yucatan. Flying down and renting a car might be much more economical and safe.