Geographical access control may be enforced by personnel (e.g., border guard, bouncer, ticket checker), or with a device such as aturnstile. There may be fences to avoid circumventing this access control. An alternative of access control in the strict sense (physically controlling access itself) is a system of checking authorized presence, see e.g. Ticket controller (transportation). A variant is exit control, e.g. of a shop (checkout) or a country