Some less prominent pieces of technology are essential in keeping the transport system safe, convenient, and efficient.

Apart from keeping the system running, they also help make the rail system convenient to use.

Signalling systems serve as the backbone of a rail system, while equipments such as automatic fare collection gates and ticketing machines make revenue collection possible, and information systems provide travel information in real-time to commuters. Platform screen doors provide climate control in stations, as well as ensuring the safety of commuters.