Road design

Cover of Modelling of Signalised Intersections: Case Study
Modelling of Signalised Intersections: Case Study
  • Publication no: AP-R365-10
  • ISBN: 978-1-921709-45-6
  • Published: 25 October 2010

This study compares and examines the performance of micro-modelling (SIDRA) and microsimulation (AIMSUN, VISSIM and Q-PARAMICS) in modelling of single signalised intersections. The aim is to contribute to the Austroads NS1371 guidelines by improving the guidance on selecting the appropriate modelling technique for a single signalised intersection study.

Two study sites were used to compare queue length, delay and environmental indicators between micro-modelling and microsimulation. Microsimulation models examined included fixed-time, vehicle-actuated and SCATSIM models. Consistency between model outputs was examined. Queue length was compared with field measurements to check accuracy.

The case study results were utilised to formulate guidance on the selection of the appropriate technique for modelling single signalised intersections. The need for an updated guideline on modelling of environmental impacts of network operation was also highlighted.

  • 1. INTRODUCTION
    • 1.1. Background and Objectives
    • 1.2. Methodology
    • 1.3. Scope and Limitations
    • 1.4. Contents of the Report
  • 2. MODEL DEVELOPMENT
    • 2.1. Elizabeth Drive and Flowerdale Road
      • 2.1.1. Intersection Geometry
      • 2.1.2. Demand
      • 2.1.3. Traffic Control
    • 2.2. Richmond Road and Garfield Road
      • 2.2.1. Intersection Geometry
      • 2.2.2. Demand
      • 2.2.3. Traffic Control
    • 2.3. Description of Models
      • 2.3.1. Scope of Models
      • 2.3.2. Basic Parameters
  • 3. QUEUE LENGTH RESULTS
    • 3.1. Queue Length Definitions
    • 3.2. Richmond Road and Garfield Road Results
    • 3.3. Analysis Data from Elizabeth Drive and Flowerdale Road
    • 3.4. Fixed-time Models for Elizabeth Drive and Flowerdale Road
      • 3.4.1. Mean Back of Queue
      • 3.4.2. Maximum Back of Queue
      • 3.4.3. Discussion
    • 3.5. VA and SCATSIM Models for Elizabeth Drive and Flowerdale Road
      • 3.5.1. Mean Back of Queue
      • 3.5.2. Maximum Back of Queue
      • 3.5.3. Discussion
    • 3.6. Summary
  • 4. DELAY RESULTS
  • 5. ENVIRONMENTAL RESULTS
  • 6. DISCUSSION
    • 6.1. Overview of Case Study
    • 6.2. Operational Modelling
    • 6.3. Austroads NS1371 Guidelines
    • 6.4. Environmental Modelling
  • 7. CONCLUSIONS AND RECOMMENDATIONS