Research On Several Simulation Technologies For Urban Microscopic Traffic System

In the past the research mainly fixed attention on the static model, which discusses the relationships among the change of traffic stream flow and density. By reason of the high-speed development of computer and need of traffic simulation, the focus is transferred to dynamic microscopic models. Microscopic model calculates position, speed and acceleration of every vehicle at each moment. It can offer great deal of information to traffic management and simulation. This dissertation focuses on microscopic dynamic traffic modeling and microscopic traffic simulation. The main contents are listed as following:1. According to the Microscopic level of traffic system,We discussed the simulation technology about dynamic Variable Environment Factors.And then ,wo implemente of the Preliminary simulation on this basis2. We take use of the VISSIM ,which is popular in field of ITS, Simulating the Lane-change and overtaking model of several vehicles behavior . We do research on the attribution and Parameters on the basis of simulation,and we analysed the key parameters Contrast to the fact.Doing these thing ,wo could know the qualified Threshold .3. Current traffic simulation software's focus is about two dimension,so it is hard to describe overall information of simulation factor.In light of this limitation, wo do some research about 3D basic Technology,so we propose to use TIN model to Construct the traffic environment on the basis of surface information digital Digital.4. We introduce the parameter of vehicle simulation model and the effect. It has been becoming increasingly important in traffic engineering and intelligent transportation system. The key point in research is validating the accord with the behavior in fact, by changing the parameter...