In rail transport, the paid area is a dedicated "inner" zone in a railway station or metro station, accessible via turnstiles or other barriers, to get into which, visitors or passengers require a valid ticket, checked smartcard or a pass. A system using paid areas is often called fare control. Passengers are allowed to enter or exit only through a faregate. A paid area usually exists in rapid transit railway stations for separating the train platform from the station exit, ensuring a passenger has paid or prepaid before reaching the railway platform and using any transport service. Such design requires a well-organized railway station layout. In some systems, paid areas are named differently - for example, on railways in the United Kingdom they are called compulsory ticket areas.[1]
A platform ticket allows non-travelers access to the paid area of a station to make a platform tour, seek for departures of friends or relatives, greet friends and family members or to assist them with their luggage without having to have a ticket for a journey. These are generally available only at major terminal stations, but other smaller stations occasionally grant platform tickets in exchange for a piece of identification.
Similarly, in some airports, such as the Pittsburgh International Airport, non-ticketed members of the public can acquire an airside access pass to visit the shops and restaurants inside the restricted area, as long as they produce a valid piece of identification and go through the security checkpoint.
^"The Railways (Penalty Fares) Regulations 2018". legislation.gov.uk. 6 April 2018. Retrieved 4 July 2020. "compulsory ticket area" means any area at a station which a person must not enter or be present in without being able to produce— (a)a valid travel ticket authorising travel on a train arriving at or departing from that area; or (b)a platform ticket authorising their entry to or presence in that area;