is a passport required to travel to mexico if your going on a bus?

would a greencard suffice?

Passport.

You need a passport.

Passport

You need one to come back.

In a bus or in a train
In a car or on a plane

you need a passport to travel any were out of the U.S... no matter if its on a car, bus, train, plane or anything else.

A passport? Bring it with you just in case. Since you are going there from another country,the police there might want to check to see if you are legit or not. If you do not have one,bring a green card and hope for the best.

Don't forget to stop for your Bio chip we need to know where you are in Our precious country.(batteries not included. You need to get your "D" batteries before at your nearest 99pesos only superstore)

Effective this June, you need a passport. Until then, US citizens can use a driver's license and birth certificate, and non-citizens need whatever is needed for nationals of their country.