Riverside High — canteen queue

How long the line is, and whether it's worth waiting.

Demo · simulated day

Showing the board at

12:05
— people
in line
—

—

—

The school day

average people in line, last 3 weeks

Two weeks of counts is enough to predict the rush. This chart works even when the counter is offline — which is why it, not the live number, is the part students end up relying on.

Last 90 minutes

people in line

What actually runs

The cafeteria

Camera

The CCTV already in the room. Nothing about it changes, and nothing new is pointed at anyone.

RTSP sub-stream · no audio
The cafeteria PC

Counter & forwarder

The machine that already sees the camera counts the queue, and forwards the picture to anyone holding the access code.

{"count": 26} + HLS
Outside

This page

Counts are kept 28 days. Video is held in memory for seconds and overwritten — there is no recording.

outbound only · no open ports
What is published, and to whom
 Who can see itWhat is kept
Queue count & forecast Anyone with the link 28 days of numbers
Live picture Access code holders only Nothing — seconds, in memory
Sound Nobody Never captured
Who anyone is Nobody No recognition, no names

Simulated data, fictional school. The live version reads the camera the cafeteria PC already sees. Live view sits behind an access code and is never recorded; the queue count is public.