On Thursday, 27 April 2017 13:18:38 UTC+1, Jeff Layman wrote:
Why three cameras, apparently pointing in the same direction, and right
next to each other? What is the motor for? It looks pretty powerful.

My guess - railway station, pointed at the ticket barriers, each camera is focused on one gate, and receives a feed from the gate of the ticket data read from the magstripe (or smartcard etc) which is superimposed on the recorded video.

Similar is used on shops where the till is linked to the CCTV so the owner can prove if the assistant isn't scanning items and letting friends have freebies.

Owain