Vestibule Law and Legal Definition
According to 49 CFR 238.5 [Title 49 – Transportation; Subtitle B -- Other Regulations Relating to Transportation; Chapter II -- Federal Railroad Administration, Department of Transportation; Part 238 -- Passenger Equipment Safety Standards; Subpart A – General], vestibule means “an area of a passenger car that normally does not contain seating and is used in passing from the seating area to the side exit doors.”