Lobby system:
A Lobby is like a control office in the field. It is established with the twin aim of reducing engine detention and crew detention in a yard or a crew or engine changing station by realistic ordering of trains and Crew/Guard booking.
It is advantageous to have a combined crew and guard booking lobby so that both are available simultaneously. The lobby supervisors/staff can take forecast of a train running from the Deputy controller/section controller along with details regarding the names of crew, Guard and their signing in time, loco particulars, last C&W examination etc.