A clock-face schedule, also cyclic schedule, is a timetable system under which public transport services run at consistent intervals, as opposed to a timetable that is purely driven by demand and has irregular headways. The name derives from the fact that departures take place at the same time or times during the day. For example, services with a half-hourly frequency might leave at 5:15, 5:45, 6:15, 6:45, 7:15, 7:45 etc.
Example of integrated timetables between interregional and regional services on the Swiss network. The two trains are programmed to meet in the hub of Geneva around 15:30 and also share a platform to minimise transfer times.