If you're staying within the US, yes. There is no prohibition against it. In some states, however, you may be required to keep it in the sleeper berth, out of reach from the cab.
a 7 inch blade
In louisiana you can carry a machete and it's legal
No, it is illegal to carry a butterfly knife with a blade longer than two inches in South Carolina. Possessing a butterfly knife with a four-inch blade is considered a misdemeanor offense.
4 inch
no CHANGE! actually it is.any length actually.look up mckall vs. maryland and youll find out why.Any knife that folds into the handle is legal.some cops just dont like it.
no you can not
If you have a NYS hunting liscense and you are carrying it while hunting or traveling to or from a hunting trip.Yes
yes you can as long as you don't conceal it and treaten people with it your fine. I carry my SOA knife all the time and no one bothers me
4 Inch suspension lift
Concealed weapons are against the law. You can carry a pocket knife as many people do, but something with a fixed blade, a more than three inch long blade, or a speciality knife such as a butterfly or switchblade knife, are against the law (in America anyway).
NO
Yes, if you put enough force into it.