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New developments in Aimsun and future trends

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Aimsun

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New developments in Aimsun and future trends

  1. 1. New developments in Aimsun and future trends
  2. 2. Overview • The integrated modelling philosophy • What’s new in Aimsun 8.2 • New trends
  3. 3. Integrated modelling MACRO MESO MICRO Static assignment Dynamic user equilibrium or Stochastic route choice OD Matrix Network data base Pathsand pathflowsdatabase Traffic flow representationTraffic assignment HYBRID S
  4. 4. Role of network loading engines Traversal OD Matrices & adjustment DTA with DUE, paths assignment file Detailed simulation, Pedestrians
  5. 5. New in Aimsun 8.2 – Demand forecasting • PT Crowding in cost functions – Iterative Equilibrium process • PT Congestion Model – Effective Frequency Model – Failure-to-board • PT OD Adjustment – uses the equilibrium PT assignment
  6. 6. New in Aimsun 8.2 – Macro level • Macro Dynamic – Presented yesterday • Use of control plan – Macro static assignment – Macro static OD adjustment – TPF
  7. 7. New in Aimsun 8.2 – Meso level • Initial state to start from – Decrease DUE time for long periods
  8. 8. New in Aimsun 8.2 – Dynamic Traffic Assignment • DUE New Gradient- based method • DUE Path pruning • Incremental DUE • Use Rgap matrices asinput • Output Rgap matrices • Rgap for SRC
  9. 9. New in Aimsun 8.2 – Micro level • Two-lane car-following model between adjacent sections • Stop line adjustable • DUE Path pruning • Incremental DUE • Use Rgap matrices as input • Output Rgap matrices • Rgap for SRC
  10. 10. New in Aimsun 8.2 – Interfaces • SCATS ITS Data Port • SCATS SRMS • SIDRA interface • VERSIT+ emissions and energy use model
  11. 11. New trends • Improve usability of the integrated framework • Activity Base Model with DTA • Automated vehicles • Aimsun Online applications • Peak spreading techniques • Meso parallelisation

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