Crowd heatmaps can be worth a thousand words. An early warning system that allows unexpected conditions to be quickly identified.
With a reach far beyond CCTV and personnel, wide-area coverage can be very cost effective.
Different teams have different real-time requirements.
So multiple dashboards can be set up, providing remote access to people counts and flows as well as a host of other metrics.
All of this can be realised with no sensors or cameras.