Route choice method using the Density criterion

Vissim calculates the number of pedestrians in the areas of the pedestrian partial routing decisions. Then Vissim calculates the volume of pedestrians in areas with the pedestrians' relevant partial routing decisions on the basis of the route choice parameters.

You can select the following Route choice parameters:

Option	Meaning
Best route	The user-defined percentage of pedestrians uses the best route. It traverses the area with the lowest pedestrian density. If there are multiple best routes, the volumes are distributed equally across them. The remaining pedestrians are distributed randomly across the other routes. Default value of 90.00%.
Kirchhoff	Kirchhoff exponent E: The probability of a route choice is calculated as the reciprocal of the density, to the power of negative Kirchhoff exponent -E divided by the sum of these powers for all routes, default value 3.5. For two partial pedestrian routes, the relative volume pi for partial route 1 is:
Logit	Logit - denominator n: The probability of a route choice is calculated as exponente to the power of (negative density - divided by the user-defined denominatorn) divided by the sum of these powers for all routes, default value 1.33 pedestrian/m2:
Logit of reciprocal	Logit of reciprocal - numerator z: the probability of a route choice is calculated as exponent : e to the power of (the numeratorz divided by the density ) divided by the sum of these powers for all routes, default value 1.33 pedestrian/m2:

Combination method: Calculation of the number of pedestrians from the route choice areas

• Total: Total density from all route choice areas. When route choice areas overlap, these areas and the pedestrians there are each taken into account only simply.
• Average: Average density from all route choice areas
• Maximum: Maximum density from all route choice areas
• Minimum: Minimum density from all route choice areas

Applies to average, maximum and minimum: When route choice areas overlap, these areas and the pedestrians there are taken into account several times, and so the density of pedestrians for each area is determined separately.