sentences:  Apart from GPS location, the transmitted messages also include information about the vehicle and which trip it is doing.With the above information, PTIPS can compare the location of a bus performing a certain trip, at a certain point in time, with where it should be, based on the planned route and timetable data.Transport for New South Wales worked with several developers in late 2012 to create, and release smartphone applications with access to the realtime bus data provided from PTIPS.