We are in the process of implementing ArcGIS for tracker to track buses for our city transit system. The Last Known Location is published as a service and the real time bus location is shared with the citizens through a Web app on ArcGIS online. The frequency of updating the location is 30s right now. It would be extremely helpful to have added options for the locations to show up at a faster rate (possibly 5-10s). The change will make it a much more efficient app for this application.