Dissertation > Excellent graduate degree dissertation topics show

OD Matrix Estimation Based on Turning Flow & Dynamic Traffic Assignment Based on Micro-Objects

Author: YuKai
Tutor: LiPing
School: Zhejiang University
Course: Control Theory and Control Engineering
Keywords: turning flow dynamic traffic assignment estimation of OD matrix Micro-simulation System ITS
CLC: U491
Type: Master's thesis
Year: 2006
Downloads: 251
Quote: 3
Read: Download Dissertation

Abstract


The obtaining of Origin-Destination matrix and traffic assignment are two core in traffic demand forecast. The estimation of OD matrix from traffic flows is a significative work. The constraint of existing OD (Origin-Destination) matrix estimation methods is usually based on road segment traffic flow. It can leads to a solution space of high-dimensions, since the number of roads is much fewer than the OD pairs. Because of this, the error of the estimated OD matrix is large. Traffic assignment is the destination of traffic demand forecast, and plays important part in OD estimation. Dynamic traffic assignment is better than static traffic assignment because it considers the time variety of traffic networks. The existing dynamic assignment methods are on the basis of macro-flows, the mathematical programming problems of these methods are hard to solve and hard to explain.The main contents and contributions of this thesis can be summed up as follows.1. Some researches are done on several important problems in the traffic assignment method. This paper gives the traffic networks and OD points’ description which are suitable for Urban Mixed Traffic. A shortest path algorithm based on User Decision Factor is given. User Decision Factor means that the shorter a road sect is away from the driver, the more important the road sect’s cost when the driver chooses his path.2. Turning traffic flow reveals more traffic information than road segment flow. Using turning flow in the estimation of OD matrix can effectively reduce the dimensions of the solution space, and highly improve the estimation result of OD matrix. This paper gives an OD matrix estimation method based on turning flow, including the traffic assignment method based on turning flow, OD matrix estimation method based on turning P-matrix, and gives a compare between this method and the OD matrix estimation method based on road segment flow though theoretical proving and an example. This method can highly reduce the dimensions of the solution space, and improve the estimation result of OD matrix.3. This paper also gives a Dynamic Traffic Assignment Method based on micro-objects. This method is on the basis of Micro-simulation system. It avoids the disadvantages of static traffic assignment, the discontinuity of traditional dynamic traffic assignment based on macro-flows and the mathematical programming used in macroscopical method.4. As the chief engineer, I design and develop the Traffic Intersection Simulation System (TiSS), which can simulate any traffic signal methods, any intersections, regular or non-regular. It includes an optimal traffic signal method module, which can get the optimal signal method from the intersection and the method can be validated in TiSS. This paper describes the system structure design of TiSS, the traffic signal method module, the detector module and the system for the estimation of road cost function (travel time) parameters.

Related Dissertations

  1. Failure Correlation Analysis of Urban Road Network Based on Dynamic Traffic Assignment,U491
  2. Research on Traffic Bottleneck Identification and Dispersal Strategy Based on DTA in City Center District,U491
  3. Mesoscopic Simulation and Its Study and Application in Urban Traffic Area Control,U491.112
  4. Study on Dynamic Traffic Assignment of Urban Road Network in Snowfall Conditions,U491.12
  5. Based on the Predator-Prey Algorithm Traffic Flow Distribution System Research,U495
  6. Research on the Model and Algorithm of Urban Road Dynamic Network Optimization and Traffic Assignment,U491
  7. Study on Bus Passenger Flow OD Matrix Estimation Methods of Multi-center Cities,U491.17
  8. Double-decker Transport Network Design Model and Method Based on Dynamic Equilibrium Theory,U491
  9. A Study on Dynamic Link Impedance Function of Transportation Network,U491
  10. Dynamic System Optimal Offline Assignment for Arrival Time Based OD: Model and Algorithm,U491
  11. The Research on OD Matrix in ITS,U495
  12. Study on Traffic Detector Optimal Location for Dynamic OD Estimation,U495
  13. A Study On Dynamic Traffic Assignment Based On Simulantion,U495
  14. Based on Logit Model of Dynamic Traffic Assignment,U491
  15. Traffic allocation method based on microscopic traffic simulation,U491.123
  16. Traffic flow forecasting with flow,TP399
  17. Guidance and Control Method Study on Dynamic Traffic Assignment,TP13
  18. The Research about Urban-Traffic Flow Guidance System and Key Technology,U12
  19. A Study on Dynamic Traffic Assignment Model for Mobile and Unmobile Mixed Traffic,U491
  20. The Collaborate Research Based on Multi-Agent between Urban Traffic Control and Route Guidance,U495

CLC: > Transportation > Road transport > Technical management of traffic engineering and road transport > Traffic engineering and traffic management
© 2012 www.DissertationTopic.Net  Mobile