The ToolTips webinars for PTV Talks is meant to give you practical features and techniques to improve your everyday workflow.
Webinar number four focuses on:
- Creating Public Transit Platforms
- Configuring Queue Areas
- Calibrating Walking Behaviors
- Leading Pedestrian Intervals
Download the presentation and example files here.
Creating Transit Platforms
Configuring Queuing Areas
Calibrating Walking Behaviors
Leading Pedestrian Intervals
Answers to Questions Asked During the Webinar
Question: How does Vissim/Viswalk handle vehicle-pedestrian conflicts?
Answer: Vissim vehicular links and Viswalk pedestrian areas do not allow for vehicle-pedestrian interaction. Therefore facilities that have pedestrians potentially conflicting with traffic must be modeled with links that are activated as “Pedestrian areas”. In this way we can utilize Vissim’s conflict areas and priority rules to manage yielding behavior for both pedestrians and vehicles.
Question: Can we model random incidents such as a turnstyle breaks or a pedestrian gets stuck?
Answer: The cleanest way to model a pedestrian blocking up a queue would be to create a custom dwell time distribution on the queuing area. In this dwell time distribution we can define the majority of interations to be fairly regular and a fractional amount to take significantly more time. Alternatively, you could use time intervals to reroute flows to other turnstyles but that option is set to a fixed time and not random.
Question: Can we model boarding and alighting passengers in private vehciels such as passenger cars or ride share?
Answer: The only way to directly model boarding and alighting with in-built functions is to use the Public Transit features. You can specify a transit vehicle to be a passenger car but all PT vehicles are restricted to an explicit schedule, stop locations, and path through the network so you cannot really randomize it. However, using the COM interface you can use vehciles parking in the in-built parking lots to generate pedestrians. See the example in the Vissim help menu (Help > Examples > Training Directory > COM > Drop-Off Zone
Question: Can we model queues based on time intervals?
Answer: You can use time intervals to dynamically open and close service points. You will need to have multiple queue selection areas stacked on top of eachother. Each queue selection area should have a service point selection partial route pointing to a set of service points (i.e. have one pointing to three service points, and another pointing to four, and so-on) and then utilize the time intervals on static partial routes to navigate pedestrians to one of the queue selection areas by setting the relative flows to 1 on the path pointing to the queue selection area with the desired service points, and a relative flow of 0 on all other paths. However, pedestrians already past this point that ahave committed to a service point will remain in that queue.