In railways, what does "trade track" refer to?

The term "trade track" specifically refers to a track that is used for the interchange of freight. This type of track is designed to facilitate the transfer of goods between different railway systems or between freight trains and loading facilities. Trade tracks are essential for effective logistics and transportation, as they allow for the movement of freight from one mode of transport to another, often connecting with other freight lines or logistical hubs.

In the context of railways, understanding the function of tracks like the trade track is crucial, as they play a major role in the transportation industry by supporting commerce and trade movement. The other options do not align with the specific purpose of a trade track. Passenger trains typically operate on different tracks designated for passenger service, maintenance access tracks serve the purpose of allowing access for maintenance on infrastructure, and tourist train lines are created for recreational travel rather than freight interchange.