Make great videos with the Aimsun recorder
April 2017: Laura Torres, Sergi Pujadas and Emmanuel Bert explain the nuts and bolts of how to get your Aimsun videos looking sharp and running smoothly.
Video: How to use View Modes to calibrate vehicle behavior in Aimsun Next
Technical Note #39
September 2019
Script – Martin Hartmann
Production – Victoria Savchenko
Voice – Molly Malcolm
A short video by Martin Hartmann on how to use View Modes in the capacity calibration process to model bottlenecks more realistically.
• Use View Modes in the capacity calibration process to model bottlenecks more realistically.
• This highway scenario models a 3 to 2 lane reduction.
• For a better overview, use the Polyline and Text tools to sketch the distances upstream from the bottleneck.
• Next, label the upstream sections.
• Visualize accelerations greater or less than 1 m/s2 to identify
major accelerations upstream from the bottleneck.
• To visualize longitudinal behavior, right-click on View Modes and create a new mode called CALIBRATION: Merging.
• Add new View Styles: Acceleration (Color) and Acceleration (Attribute).
• For a better overview put the most important parameters in a Text box.
• Turn on the View Mode and study the driving behavior under various traffic flow regimes.
• Visualize the total number of lane changes upstream from the bottleneck.
• Add a section Dynamic Attribute ‘Total Number of Lane Changes’ represented by ‘Color’,
• Add a condition to limit the View Mode to the sections upstream of the bottleneck.
• Use the same technique to add ‘Color opacity’ and ‘Attribute’ View Styles to the View Mode.
• Switch between the statistical intervals to compare outputs.
• Add Real Data Sets and follow the national guidelines to validate the simulated bottleneck capacities.
More technical notes
Using space-time diagrams for calibration
Dimitris Triantafyllos explains how to create speed contour plots in Aimsun Next to show the time, location, and subsequent propagation and dispersal of congestion on the highway.
