When masses of folk populate an area, aptly named mass transportation becomes a requirement for cities to operate efficiently. The labor force must be shuttled to and fro, locomotive convenience oils the wheels of commerce, and shoppers always need a ride to the mall.
   As the architect of an urban train system and the city it serves, your job is to aid in the development of a rising metropolis by building an efficient and functional railway system to meet the growing needs of the populace. As construction specialist, you're charged with the layout of the city as well as the criss-cross of railroad tracks to best serve your rider-ship and the flow of trade. Locales catering to large concentrations of people will overload your fledgeling railroad if insufficient trains are routed to that area. Assuage these concerns by planting more tracks and trains to heavily populated areas. Likewise, stations with few riders should be well suited if a train chugs in every once in a while. The trick is to watch city growth and gauge demand; the game helps in this respect by providing a detailed city map which tracks your construction, which in turn infers population spikes.  
   New to this version of the popular A-Train series are various railroad systems to implement as well as different types of trains including suburban types, semi-fast models, double deckers, and cargo transports. A primer on train system management helps beginners cop a feel for setting up new routes, introducing trains to a system and guiding general development as your web work of steel tracks balloon and scale to meet the needs of urban sprawl.