Traveling by Rail and BusRail travel is very restrictive of knife carry. Amtrak, for example, bans knives completely. They are not allowed on your person, in your carry-on, or in stowed luggage.
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The following items are prohibited onboard the train: non-service animals, firearms and ammunition, hover boards, corrosive or dangerous chemicals and materials, incendiaries, martial arts and self-defense items, archery equipment, devices containing propellants, sharp objects, and similar items.
When you travel with us, you can carry-on two free pieces of luggage. Each item should not exceed 50 lbs. (23 kg) and needs to be 28 x 22 x 14 inches in size. For those Amtrak families traveling with infants under the age of two, your baby items (strollers and diaper bags) will not count towards your carry-on limit.
As a result, prohibited items may result in both a TSA civil enforcement action and a criminal enforcement action. Before leaving home, remember to check your baggage to ensure you are not carrying any prohibited items to avoid a possible arrest and/or civil penalties.