Network nodes are used to graphically define the following things in pedestrian dynamics models:
You can also use an area to define:
Demo model: Areas with Restrictions for Pedestrians
Pedestrian Library works with the following two network nodes:
Use Polygonal node when the area you model has complex form. If your area is rectangular, use Rectangular node instead.
You can make the node sloped, e.g. to model stairs, see the following demo model:
Demo model: Stairs
Pedestrians will try to avoid closed nodes (if Avoid area if closed option is selected in the node's properties), as long as they have a different route option. They perceive the changes in the node's state (closed/open) and can recalculate their route accordingly. If they encounter a closed node, they will handle it like an obstacle, just like they handle walls.
When a restricted node and service lines overlap, pedestrians will choose the line that is not restricted by the closed node.
When a route is created for pedestrian groups, all members of the group receive the same instructions on how to handle the closed nodes: either all of them wait until the node opens or all of them bypass the node.
When the members of the group get into a queue to enter a node, every member is handled individually: they enter the node one by one.
Access restrictions do not apply to pedestrians that appear inside the restricted nodes, such as: