Logging Vehicle and Pedestrian Movements

When you start a study after creating it you are presented with an interface such as the one shown in the figure. The interface is made out of a series of images representing events that can be logged.

Vehicle Events

For example, if you want to log a u-turn you need to tap the corresponding button. Similar buttons are available on each corner of the approach. Each corner represents a different approach of the intersection. The northbound approach is identified by the brightest of the large red arrows visible in the figure.

Explanation of Interface Items

Pedestrian Events

In addition to the movements typically associated with vehicles or bicycles, the interface shown allows you to log pedestrian events. The pedestrian events are shown bythe arrows with the P1 and P2 labels. Tapping on the aforementioned arrows creates either a pedestrian one (P1) event or a pedestrian two (P2) event. How you interpret the meaning of pedestrians one or two in the final report is up to you. However, a traditional approach is to assume that P1 represent pedestrians crossing the approach from the left while P2 represents pedestrians crossing the approach from the right.

Vehicle Types

The images that show 1, 2, 3, and 4 represent the active vehicle type associated with each vehicle movement. When a vehicle type is active, the number is highlighted in a brighter red color. The active vehicle is assigned as the vehicle type for the next vehicle movement logged. For example, if the active vehicle is set to 3 and the northbound u-turn movement is tapped then the event logged by the app is for a northbound type 3 vehicle making a u-turn. Unless changed using the “Interface Settings” once a vehicle movement is logged the active vehicle type resets to type 1 after each vehicle event.

A more detailed explanation of how vehicle types are handled and how they can be used is available in this support article.