A study on communication between the vehicle saturation degree data and the electronic map in the ITS

In the intelligent traffic system (ITS), vehicle saturation degree data of every road section must be sent to users accurately, in real-time and reliably, so their data amount is enormous. In order to improve the utilization ratio of a signal channel, this paper puts forward a new method of transmission of traffic flowing data, that is sectioning transmission of vehicle saturation degree data and color mark in electronic map. As according with Gauss distribution, in terms of the principle of equal probability, the saturation degree data can be divided into several section such as 74%-100% stands for jam, and every section can be coded by a 1-bit number. In the electronic map of user, the saturation degree data of every road section can be marked by color such as green stands for free, bright red stands for jams and so on. The experiments have proved that this method can improve utilization ratio of a signal channel largely, the effect is good.