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VISSIM 5.30-05 User Manual

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The Pedestrians Editor (Add-on)<br />

Example The figure illustrates a pedestrian route with one intermediate strategic<br />

point:<br />

7.1.8.8 Dynamic Potential: Overview<br />

The dynamic potential is a route-related method to control operational<br />

wayfinding. The basic intention is to make pedestrians walk not on the<br />

shortest but more on the quickest path.<br />

Additionally to this overview, the following information on the dynamic<br />

potential of pedestrian wayfinding is provided below:<br />

► For use case descriptions, cf. section 7.1.8.9<br />

► For the editing workflow, cf. section 7.1.8.10<br />

► For the properties & options, cf. section 7.1.8.11<br />

► For the method in detail, cf. 7.1.8.12<br />

One way to look at the dynamic potential is to see it as a continuous<br />

complement to travel time based dynamic partial routes. For both the basic<br />

idea is that minimizing travel time is a determinant of walking behavior.<br />

However, while travel time based partial routes offer a way to make<br />

pedestrians discretely choose between distinct routes at one point in time.<br />

With the dynamic potential activated for a destination or intermediate<br />

destination (in the remainder of the section intermediate destinations are<br />

always included, when destinations are mentioned) pedestrians are seeking<br />

to walk what they currently estimate to be the quickest path. In slightly more<br />

technical terms: they desire to walk into that direction in which by estimation<br />

of some heuristic mathematical method their remaining walking time to the<br />

next destination is minimized.<br />

Already in this rough description of the method of the dynamic potential the<br />

continuous character is exhibited: there is not one single time of decision, but<br />

– as far as the time step of the simulation allows – a continuous optimization<br />

behavior of the pedestrians with regard to travel time; the pedestrians do not<br />

try to walk on one (the one with the smallest travel time) out of a finite<br />

<strong>User</strong> <strong>Manual</strong> © PTV AG 2011 387

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