budnmary, thanks for your response.

Actually, I am considering a roundtrip from Cancun to AC in a rented mexican car during a 2 week stay south of Cancun in March, 2002.

My concerns were:
1. estimated driving time
2. condition of the roads
3. border crossing in a rented vehicle.

I would be on an American passport.

Regards, Joe G.

Joe Galen