Data: Gap Average

This query returns the average of gaps over a statistical interval. The gap is the difference between the time when the rear of a vehicle leaves a point on the highway and the time the front of the next vehicle arrives at the same point (in seconds).

• If non-valid selections appear when clicking in a parameter field, the forms autofill option in the browser history needs to be cleared.

1. Click the Data tab.
2. From the drop-down to the right of Query, select Gap, average.
3. Click Save as file name and enter a name for the file.

   The name can be any number of alphanumeric, dash (-), underscore (_) or space characters. If omitted, the default is average-gap.

4. Click the icon to the right of the date/time field.
5. Select the starting date and time of the query. It will appear in the From field.
6. Select the ending date and time of the query. It will appear in the To field.
   • The defaults for date/time are the earliest record to the current date and time.
7. Click Set.
8. Enter the zone(s) for which data is to be included in the download.

   To enter multiple zones, separate each entry with a space (e.g., 1 2 4 etc.), or with a dash for a range of zones (e.g., 2-5).

   To specify all zones, leave the field blank.

9. Select the time frame, Minutes or Seconds, and enter the interval for which data is to be included in the download.

   If omitted, the default is 15 minutes.

10. To run the query, click Download. The requested data is saved as a CSV file in the Downloads folder.