Abstract:

Aiming at the problem that the time intervals of sampling and transmitting of GPS data of the traffic information collection system based on the GPS equipped floating car were chosen by subjective experiences, and the related theoretical studies divoreed more or less from the practical application, judging indexes reflecting the relationship between the quality of the traffic information and the time intervals of GPS data sampling and transmitting were suggested, optimization methods were designed for these two time intervals and verified with measured data. The results showed that the best time intervals can be determined intuitively using the suggested methods, providing a reliable basis for the parameter setting of the GPS floating car traffic information collection system.

Key words: engineering of communications and transportation, floating car, sampling interval, transmitting interval