TSS completes calibration of Paris macroscopic model

Every four years or so the City of Paris macroscopic model requires recalibration with new data. This includes traffic counts and journey times and also new demand, which comes from another four-step travel demand model of the Île-de-France area.

The calibration of the macroscopic model of Paris is part of the area-wide modelling project of the entire Paris metropolitan area that was commissioned in 2010 by the Mairie de Paris (City of Paris), specifically, the Section Etudes et Exploitation (Assessment and Operations Section) within the Département de la Voirie et des Déplacement (Department of Roads and Transport), which oversees all the macroscopic and microscopic traffic assessment studies for any project that involves traffic changes in the Paris area.

TSS has just completed the calibration for the AM and PM peak periods. This process began in 2010 and included the following tasks:

  • Importation of the original DAVIS model into Aimsun (geometry and network parameters)
  • Importation of the demand generated by a four-step travel demand model
  • Numerous site-visits to improve the model quality and fidelity
  • Calibration of parameters with the aid of real data sets, based on global and local analyses and on matrix adjustments

TSS has also developed a Project Management Module for the City of Paris that offers the option to form links between layers where there are changes in geometry, capacity etc.

Technical specifications for the Paris/Île-de-France macroscopic model:

  • Km route:18,704 km
  • Km road:18,716 km
  • Number of sections: 41,683
  • Number of intersections: 18,653
  • Simulation periods: AM and PM rush hours
  • Total demand: 1,151,257 vehicles between 08:00 and 09:00; 1,305,531 vehicles between 18:00 and 19:00; 2,158 centroids
  • Validation criteria: R2 = 0.95 across 4,000 detectors. Travel times for 220 different routes.

Aimsun Paris/ Île-de-France macroscopic model

Zoom – Paris city area

Paris macroscopic model – speeds