重庆交通大学：《交通控制理论和方法 Traffic Control Theory and Methods》研究生课程PPT教学课件_chapter3 Traffic Flow Modelling

Traffic Control Theory and Methods (交通控制理论和方法) For Master Students in Transport Chongqing Jiaotong University

Traffic Control Theory and Methods (交通控制理论和方法 ) Chongqing Jiaotong University For Master Students in Transport

Chapter 3 Traffic Flow Modelling 3.1 Overview of comparable domains 3.2 Characteristics of Traffic flow 3.3 Typical process situations( scenarios) 3.4 Evolution of network process control

Chapter 3 Traffic Flow Modelling 3.1 Overview of Comparable Domains 3.2 Characteristics of Traffic Flow 3.3 Typical process situations(scenarios) 3.4 Evolution of network process control

Chapter 3 Traffic Flow Modelling 3.1 Overview of Comparable domains Common characteristics Network Flow Demand(geographically distributed) Flow control Storage capacity Flow capacity

3.1 Overview of Comparable Domains Common characteristics: Network Flow Demand (geographically distributed) Flow control Storage capacity Flow capacity Chapter 3 Traffic Flow Modelling

Chapter 3 Traffic Flow Modelling 3.1 Overview of comparable domains Water/Gas distributions Demand at destinations Minimize energy and losses Sewer networks Demand at origins Minimize overflows

Water/Gas Distributions Demand at destinations Minimize energy and losses Sewer Networks Demand at origins Minimize overflows Chapter 3 Traffic Flow Modelling 3.1 Overview of Comparable Domains

e Chapter 3 Traffic Flow Modelling 3.1 Overview of comparable domains Electricity Distribution Like gas/water, but No storage possibility Very rapid phenomena(real time Communication Networks Demand at origins Particles have delivery addresses Rapidity(information exchange is part of the flow) decentralized solutions Minimize total time spent

Electricity Distribution Like gas/water, but No storage possibility Very rapid phenomena (real time!) Communication Networks Demand at origins Particles have delivery addresses Rapidity (information exchange is part of the flow): decentralized solutions! Minimize total time spent Chapter 3 Traffic Flow Modelling 3.1 Overview of Comparable Domains

e Chapter 3 Traffic Flow Modelling 3.1 Overview of comparable domains Motorway/Road Networks Particles are decision makers(traffic assignment AirMMaritime/Rail Traffic Limited storage Particle control: combinatorial

Motorway/Road Networks Particles are decision makers (traffic assignment) Air/Maritime/Rail Traffic Limited storage Particle control: combinatorial Chapter 3 Traffic Flow Modelling 3.1 Overview of Comparable Domains

e Chapter 3 Traffic Flow Modelling 3.2 Characteristics of Traffic flow A. Definition of traffic flow Vehicles passing with a period time B. States of traffic floy Random and changing

A. Definition of traffic flow Vehicles passing with a period time 3.2 Characteristics of Traffic Flow B. States of traffic flow Random and changing Chapter 3 Traffic Flow Modelling

e Chapter 3 Traffic Flow Modelling 3.2 Characteristics of Traffic flow C. Classification of traffic flow Static state and dynamic state D. Features of traffic flow Movable/congestion, waiting at queue E. Attributes of traffic flow Measurable and controllable, diversity time/space

D. Features of traffic flow Movable/congestion, waiting at queue E. Attributes of traffic flow Measurable and controllable, diversity time/space C. Classification of traffic flow Static state and dynamic state 3.2 Characteristics of Traffic Flow Chapter 3 Traffic Flow Modelling

e Chapter 3 Traffic Flow Modelling 3.3 Typical process situations(scenarios) Low demand(off peak Predicable high demand(peak hour Non-predicable high demand(special events) Capacity-reducing(incidents Device failures

3.3 Typical process situations(scenarios) • Low demand (off peak) • Predicable high demand (peak hour) • Non-predicable high demand (special events) • Capacity-reducing (incidents) • Device failures Chapter 3 Traffic Flow Modelling

e Chapter 3 Traffic Flow Modelling 3.4 Evolution of network process control No control(construction) Fixed control local Fixed control, network-wide(off-line) Local automatic control Surveillance, network-wide(real-time) Coordinated control (real-time) Integrated control(real time)

3.4 Evolution of network process control • No control (construction) • Fixed control, local • Fixed control, network-wide (off-line) • Local automatic control • Surveillance, network-wide (real-time) • Coordinated control (real-time) • Integrated control (real time) Chapter 3 Traffic Flow Modelling