They participate in a variety of assignments, including community policing foot patrols, parking enforcement, evening escorts, bicycle patrol, residence hall patrol, library patrol, building security and access, responding to fire egress door alarms, panic alarms, smoke alarms, and working various special events. Screening persons for identification, purpose of visit, or required authorization, participating in searches for missing persons or property, operating two-way radios and/or base station address systems, locking or unlocking doors, gates, etc., directing or controlling traffic, raising or lowering flags, assessing road conditions to determine the need for emergency snow removal or sanding.