Transport network

The railway network has first and second rail lines sharing at least a portion of the same track corridor and a station C1; the first line 110 has a hub station 112 where passengers can transfer to access an airport 102; the second rail line 106 provides a through service via the airport. The first rail line may be a main line providing direct access to stations serving cities or towns of different populations, with the hub located half way between them as measured by time, distance, or number of intermediate stops; a third freight line 117 may depart from the first line at one side of the hub station and cross over at the other side to connect with the second rail line, which may be an express line to the airport, running alongside a major road. The hub may have platforms for trains running at different frequencies so they may arrive at the same time as each other; airport security may be provided so passengers travel air-side from the hub, with a separate baggage transit system, on a train link between the hub and the airport provided as an extension of an existing train link to the airport from a population center.