To use this layer in support of a new event, go to: My Content-Create-New Hosted Feature Layer From Existing Layer to spin up a new version of this service which you can bring into a web map to begin configuring your event plan and supporting web apps.
This service brings together three Esri solution templates: Special Event Planning, Pre-Incident Planning, and Road Closures modified slightly to support complete event management needs of Law Enforcement. For more information on solution templates go to solutions.esri.com.