In message , at 12:18:24 on Fri, 18 Sep
2015, Neil Williams remarked:
A lens with LEDs (infra red I presume) around it.

Looks like a camera, then. Though it is by no means clear what is done
with the data from the camera; possibly nothing other than checking
whether it sees a car or a piece of tarmac.

I'd regard that as highly unlikely.

Germany, for instance, is not a CCTV loving country, and while cameras
are usually provided for DOO train dispatch they are often not used for
surveillance.

Germany is a different country with a very different approach to privacy
(and also a different approach to arming their police, although I don't
claim there's any direct correlation).
--
Roland Perry