Impacts of Applying Automated Vehicle Location Systems to Public Bus Transport Management

Abstract

The proliferation of cheap and compact Global Positioning System (GPS) receivers has led to most Automatic Vehicle Location (AVL) systems today relying almost exclusively on satellite-based locating systems, as GPS is the most stable implementation of these. This paper presents the characteristics of a proposed system for tracking and analysing public bus transport in a typical medium-sized city and contrasts the characteristics of such a system to those of general purpose AVL systems. Specific properties of the routes analysed by the AVL system used for the analysis of public transport in our study include cyclic vehicle routes, the need for specific performance reports, etc. This paper specifically deals with vehicle motion predictions and the estimation of station arrival time, coupled with automatically generated reports on timetable conformance and other performance measures. Another side of the observed problem is efficient transfer of data from the vehicles to the control centre. The ubiquity of GSM packet data transfer technologies coupled with reduced data transfer costs have caused today’s AVL systems to rely mainly on packet data transfer services from mobile operators as the communications channel between vehicles and the control

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