Freight hubs include classification yards, airports, seaports, and truck terminals, or combinations of these.Many airlines around the world operate hub-and-spoke systems facilitating passenger connections between their respective flights.This makes it important for airports to be connected to the surrounding transport infrastructure, including roads, bus services, and railway and rapid transit systems.Another method is to use focus cities to implement point-to-point service for high traffic routes, bypassing the hub entirely.With the growth of containerization, intermodal freight transport has become more efficient, often making multiple legs cheaper than through services—increasing the use of hubs.