Journey time analysis from GPS based tracking systems.

Two recent New Zealand surveys have used GPS technology to collect journey time data. A relatively simple exercise to determine car travel times has been carried out in Hawke’s Bay as part of the Hawke’s Bay Regional Traffic Study. In Christchurch, the buses have recently been equipped with GPS devices, and on all routes are sampled twice a minute to about 10 metres accuracy. The position of the bus stops is also known. From this data, the time spent moving, time stopped at intersections, and the deceleration time spent at the bus stop, and acceleration time back into the traffic stream can be separately identified. The paper describes briefly the data collection techniques in the two surveys, the way in which the surveys have been analysed, and the ongoing utility of, in particular, the Real Time Tracking data. (Author/publisher) For the covering entry of this conference, please see ITRD abstract no. E213669.