Strange (false) alert

[Licht77]

Oh - thanks, good to know! But I am still curious as I never got a speeding ticket on that spot
Is there any easy way to detect the source of that 905nm radiation like e.g. making IR visible with a camera?

[BestRadarDetectors]

Oh - thanks, good to know! But I am still curious as I never got a speeding ticket on that spot
Is there any easy way to detect the source of that 905nm radiation like e.g. making IR visible with a camera?

If you have an IR Camera you should be able to find it but there is definitely something there. I do see a camera on the right before you enter the tunnel and also some cameras inside the tunnel but these devices are not used in the US so I cant be sure. Even if not aiming at you there will be reflections that your front sensors will pick up.

[Licht77]

Yes this camera in front of the tunnel is pretty suspicious and I stopped there for further examination. But cams like that one and those inside the tunnels are standard here - they are there for security reasons (car breakdown, crashes, avalanches, ...) only. Addionally, Section control is not legal here at the moment
The only "non-standard" thing here is the garage right to the tunnel which belongs to the firefighters... AND there is a speed-display on the left side for the traffic running the other direction - but this one is a k-band and informational only without flash/camera.