The Research On OD Matrix In ITS

This article introduced the intelligent transportation system (ITS) and its subsystem advanced traffic management system (ATMS) composition. The intelligent transportation system is the advanced information technology , the data communication transmission technology, the electronic control technology as well as the computer processing technology and the advanced administration method unifies, causes its effectively to synthesize utilizes in the transportation service, the control and the management. Its goal is causes the human, the vehicle, the road close coordination, the harmonious unification, enormously enhances the synthesis transportation efficiency, the safeguard traffic safety, the improvement environment quality and raises the energy use factor. The article first introduced national and the local intelligence transportation and so on America, date, Europe some development situations and our country intelligence transportation system development situation. The advanced traffic management system implementation first must establish modernized the traffic engineering facility, like the installment computerized transportation control device, the new style road traffic detector and the supervisory system, as well as suppose these the spare reliable correspondence network to combine to form the whole, above this foundation, strengthens the road - vehicle system movement gradually the view ability. This developing process characteristic including will analyze each kind of origin the traffic information software development, the fast survey highway traffic accident equipment development, as well as the sensation, the forecast future traffic jam and produces the traffic control best strategy the expert system development. The advanced traffic management system goal is the improvement existing road network movement condition, enhances the path the effective use factor and the traffic flow, reduces the path the traffic congestion degree, the traffic accident formation rate as well as because traffic congestion, the accident and so on creates goes on a journey the time to lengthen, reduces the oil consumption, the reduced waste gas discharges and so on. This article more detailed introduction advanced traffic management system composition and principle of work. As ATMS and the ITS essential technology OD matrix (OD traffic flow) is this article key research content. The OD matrix then has reflected in the specific time interval along with the time variation transportation demand pattern. Along with intelligence transportation system (ITS) the development, OD estimatedand the forecast more and more receives takes. Regarding the ITS in advanced traffic management system (ATMS), the transportation control and the way induction plan formulation not only relies on the current transportation demand pattern, moreover will rely on the future transportation demand condition. Therefore, the OD matrix estimate and the forecast are necessary. This article was detailed has carried on the analysis to the OD traffic flow distribution and the assignment, introduced the commonly used each kind of model and its the good and bad points, have carried on the static state and the dynamic traffic distribution the more detailed analysis comparison, also has pointed out the direction for the dynamic traffic distribution development-...