In transport networks, the available infrastructure may vary through the day. In this technical note I’ll show you how to close lanes temporarily in one direction so that they can be used by traffic traveling in the other direction. Note that lanes in Aimsun Next are not two-way, so you’ll need to code the reversible lane in both directions and close the direction that is not operative based on time or other conditions.
I’m going to concentrate on two different examples:
- Managing a reversible lane change following a set-up timetable.
- Managing a tram track shared by trams on both directions.
The main Aimsun Next functionality that will give us full control of the infrastructure available at a particular time is Traffic Management, through the Lane Closure action. At the end of the technical note, I’ll give you an alternative coding through Geometry Configurations if there are no infrastructure updates within the simulation interval but rather from one scenario to another.
Here’s how to implement a reversible lane that changes from four lanes Eastbound (EB) + three lanes Westbound (WB) to three lanes EB + four lanes WB gradually, section by section from West to East.
Let’s simplify the example to one reversible lane instead of the three reversible lanes that you can see in the image, but the workflow is identical and independent of the number of lanes that are reversible.