Privileged transit traffic

Privileged transit traffic or corridor traffic is traffic of one country across the territory of another country without usual customs and passport checks. The corresponding line of communication (usually a railway) is called the (privileged) traffic corridor and a train used in this kind of transit is called a corridor train (, ). The reason for such arrangements is usually border changes or border creation which cut through an existing transport corridor.
Air traffic.
Air traffic has in general a number of privileged transit traffic rights, making it suitable to reach enclaves or isolated countries.