Three dynamic dashboards are available to develop custom analyses within this tab to review vehicle, bicycle, and pedestrian movement patterns. These studies include StreetLight Data analysis and review, trip purpose, average daily traffic volumes, average vehicle miles traveled, hourly traffic volumes and peak travel time, average travel time, trip purpose, visitor vs. resident, travel time differential, and circuity.
These analyses rely on the use of Traffic Analysis Zones (TAZs), which were developed based on the Teton County Future Land Use Plan. A total of 41 TAZs were developed with considerations for zone boundaries, ownership boundaries, census block boundaries, administrative boundaries, and end-result factors. Of these 41 zones, 13 fall within the Town of Jackson limits, 16 are within the Teton County limits, 9 are outside of the County, and 2 are overlapping zones developed to capture the complete analysis of the Town of Jackson Town Limits and Teton County. The County Zone was determined based on the area of interest for some of the metrics while not including some areas in the County and Yellowstone not deemed relevant to data collection goals.
Mode of Travel:
The means by which a person or goods move. Within StreetLight Data Location-Based Services data, StreetLight currently offers the ability to study Bicycle, Pedestrian, and All Modes. All Modes include all personal travel and may include bicycle, pedestrian, vehicle, bus, etc. However, this category has a vehicular bias because its trips are locked to a vehicle road network. Vehicles (referred to as All Vehicles within StreetLight) mode of travel uses the Location-Based Services (LBS) data source, obtained from smartphone apps that use opt-in location-based services. The LBS data contains data from people carrying their devices in whichever way they are traveling, such as in cars, trucks, on bicycles, and so on. For LBS data, while the source is inclusive of many modes, the data source is processed with a vehicular bias. When the pings from a device create a trip, and that trip moves like a motorized vehicle, it is counted in the All Vehicle mode. For example, if the device is traveling on the road network and moves far enough for long enough, it is consistent with the movement of a car, truck, bus, or another motorized vehicle.
Average Daily Traffic (ADT):
This represents an estimated number of vehicles, bicycles, or pedestrian trips that interact with your zone or zones of analysis. Using the seasonal adjustment filters, the ADT output represents an estimated vehicular, bicycle, or pedestrian trip count that can be compared across time to reflect monthly, seasonal, or annual trends. With the provided dashboards, it represents an estimate of vehicles starting or stopping in the defined area.
Vehicle Miles Traveled (VMT):
VMT measures the amount of travel for all vehicles in a geographic region over a given period of time. It is calculated as the sum of the number of miles traveled by each vehicle (StreetLight Data). A Zone Activity Analysis calculates the average trip length and average daily zone traffic. This includes all trips that start and end in the zone, regardless of either origin or destination. Below is the calculation used to generate VMT.
Total Vehicle Miles Traveled per time period =
Avg All Trip Length (mi) x Average Daily Zone Traffic (StreetLight Volume) x
number days within time period