VISSIM 5.30-05 User Manual

Scenario 3: Survey/interview
The Pedestrians Editor (Add-on)
Typical queuingThreshold Proceed to service point if no more than __ people
are queuing there = 0. This factor ensures that there is no queue at a service
point.
Prerequisites and Conditions for Application
► There is one main difference between partial routing decisions with the
method Service point selection and other partial routing decisions: In
order for the partial route to be “seen” by a pedestrian, an intermediate
point of the original route of the pedestrian must be located on the area
where the partial routing decision is defined (decision area). Pedestrians
following a route that has no intermediate point on the decision area are
not affected by the partial routing decision (and they do not proceed to a
service point, of course).
► Each of the partial routes needs to include at least one intermediate
point on a queuing area (with an optional dwell time).
► For a central queue, the routing decision must be placed on a queuing
area (with an optional dwell time)
► For an immediate service point allocation, the routing decision must not
be placed on a queuing area.
Calculation Methods
n is the route choice method parameter (queuingThreshold) that can be
edited by the user which defines the maximum number of pedestrians
queuing at one service point that still allows selection ot that queue.
► If the decision area is a queuing area, the first pedestrian in the queue
1. waits until his waiting time at the decision area is over (if a waiting
time distribution is defined there),
2. continues to the best queue only if at least one service point has no
more than n pedestrians queuing. If all queues are “full”, the
pedestrian waits until a space in one of the service point queues
becomes available.
User Manual © PTV AG 2011 393