VISSIM 5.30-05 User Manual

7 Simulation of Pedestrians
7.5 Simulation of Pedestrians: Preconditions & How to
This section describes the preconditions which are required for a pedestrian
simulation and also the internal process of the simulation.
7.5.1 Preconditions for Simulating Pedestrian Flows
1. Every external pedestrian movement *.DLL file that is referenced by a
type of pedestrians must exist at the referenced location.
2. The *.DLL files must be installed correctly and their dependencies to third
party *.DLL files must be fulfilled. The latter can be checked using the
tool „Dependency Walker“ (http://www.dependencywalker.com/).
3. All pedestrian types must reference an existing and valid external
pedestrian movement *.DLL file.
4. The folder PEDESTRIANMODELDATA must exist in VISSIM’s executable
path even if no pedestrian model *.DLL file uses it.
5. At least one pedestrian type must be defined including a valid reference
to an external movement *.DLL (cf. section 7.1.2).
6. At least one pedestrian composition must be defined.
7. At least one pedestrian input must be defined and yield pedestrians.
8. On every pedestrian input, there must be at least one pedestrian routing
decision.
9. At every pedestrian routing decision on pedestrian inputs there must be
at least one route for every pedestrian type that belongs to a pedestrian
composition on that input.
10. All sequences of pedestrian areas referenced by any pedestrian route
must be valid – every (intermediate or final) stop of the route must be
reachable on walking ground from its predecessor.
11. Be careful in case of obstacles being located closed to each other:
Depending on the external movement *.DLL pedestrians might get stuck
in the alleyway and there might be no walkable trajectory along some
strategic path.
7.5.2 How the Simulation Internally Works
Inserting pedestrians at pedestrian inputs
On pedestrian areas where pedestrian inputs are defined it is mandatory to
define routing decisions for pedestrians as well. There must be at least one
route for every pedestrian type that belongs to the input. Pedestrians without
a strategic route are not defined and simulation will stop with an error in that
case.
426 VISSIM 5.30-05 © PTV AG 2011