text: does anybody know about having a passport to travel by land?? we usually travel to mexico every year for christmas, but i heard that now we need to use a passport even to travel by land. some in my family are us citizens and others are permanent residents, and that they also need another type of id like a "matricula" or a mexican passport.......  i really appreciate the help, and i'm sure a lot of others will too.!! i don't know the 'by land' route, but at my work they just sent out an email stating travel to canada and mexico requires a passport,  the email states:  new 2007 passport requirements:      u.s. citizens planning for their travel in the new year should be aware that effective 8-jan, 2007 passports will be required for air or cruise travel to canada, the caribbean, mexico, central and south america and bermuda. all children regardless of age (including newborns and infants) must have their own passport.     http://travel.state.gov/passport/passport_1738.html