Control and/or monitor access through rail stations, facilities and rail cars, determine the extent of threats and/or incidents against persons and property at rail stations, facilities and rail cars, prompt response to and/or reporting of said threats and/or incidents (e.g., summoning appropriate assistance), and exert appropriate force, where and as necessary. To patrol rail stations and rail system via train and provide security guard coverage at or various rapid transit stations, trains, platforms, right of way and pedestrian ways as determined by CTA Security Department.