Route choice method using the Travel time criterion
The following steps are performed:
1. The pedestrians are equally distributed across all pedestrian routes of the routing decision.
2. Vissim evaluates the travel times of the pedestrians who have finished this pedestrian route. You can enter the number of these pedestrians in the field Average of the last <number> pedestrians. The default value is 10. If the number of pedestrians is < 10, an even distribution is taken as a basis.
3. Travel time of route i = Ti is the average travel times of the last user-defined number of pedestrians who have finished a route. It can also be the average of travel times of pedestrians who have so far arrived at the route destination.
You can select the following Route choice parameters:
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Option |
Meaning |
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Best Route |
The user-defined percentage of pedestrians uses the best route. That is the route with the least travel time. If there are two best routes, the volumes are distributed equally on both routes. The remaining pedestrians are distributed randomly across the other routes. Default value of 90.00%. |
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Kirchhoff |
Kirchhoff exponent: The probability of a route choice is calculated as the reciprocal of the travel time RZ to the power of Kirchhoff exponent E) divided by the sum of these powers for all routes, default value 3.5. For two partial routes, the relative volume pi for partial route 1 is:
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Logit |
Logit - denominator: The probability of a route choice is calculated as exponent e to the power of (the negative travel time-RZ divided by the user-defined denominator c), divided by the sum of these powers for all routes, default value 10 seconds:
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Logit of reciprocal |
Logit of reciprocal - numerator z: the probability of a route choice is calculated as exponent e, to the power of (the numerator z divided by the travel timeRZ), divided by the sum of these powers for all routes, default value 10 seconds:
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