Study On Route-choice Model Based On ITS

Despite of the thorough research of route-choice problem which scholars have already had worldwidely, with the development of new technologies such as computer and network technology, intelligence traffic system has got broad application and has developed in home and abroad. ITS ,especially advanced travel information system(AYIS) can provide real time, accurat and all-direction information and route leading service, which have changed people's travel behavior and route choice way. So on the overall situation of development of ITS, studies on the route-choice behavior effect of ITS, studies on route-choice model which ITS affects and their algorithm, have important theory and practical significance.Based on the studies of route-choice behavior and route-choice model which were already studied, according to the effect of traffic information to travel behavior, the effect mechanism has been studied , the route choice model and algorithm under ITS affecting have been reached .At last, road-net reliability on the thesis basis of route choice principle and route choice model has been caculated. Main contents include the following several aspects:Choose model research result has been retrospected and valuated. Several relatively mature models have been introduced firstly; Then analytical of route choice mechanism has been carried out under general traffic information taking-over ;Finally the nonlinearity plan model which has been published by other scholars has been given .The content and developed course of ITS have been summed up , and then the travel behavior effected by ITS has been discussed. Since ATIS effect , traffic stream in network is not unitary certain equilibrium state, but is an composed equilibrium state in which several kinds of choosing behavior exists side by side.After analysed the effect of ITS to choosing behavior, the route-choice model based on ITS has been builded and caculated. Preparing program was carried out first for model building. looked on BPR function as time impedance function, travel time and its difference were made of travel cost function; And then, the person route choice has been marked an acceptance inducing two kinds condition on base of whether accept guidance: Rate of flow assigns that part accepting guidance according to that system is optimum or the consumer being on the march give preferential treatment most, the rate of flow not having accepted guidance assigns a model according to random balance. Such two parts build up route choice commixture balance combining model; in the light of the relatively mature F-W algorithm , we have found the solution of the model taken above. Made use of the route choice model reached before, the time reliability of traffic network has been further studied.