White Square Boxes above traffic light

aardvaak

I have just seen on the A1108 Earlham Road, Norwich at the five way roundabout two white Square Boxes above pedestrian traffic lights each facing in line with the traffic.
I have never seen these before and wonder if anyone knew what the are?
I suspect they are for the emergency services to change the lights but I am not sure

Johno100

Do you mean like this?

NaughtiusMaximus

Johno100 wrote: »

Do you mean like this?

I always assumed those were traffic sensors.

gollum007

Radio aerials.

They allow the lights to communicate with emergency vehicles, the control center etc.

The traffic sensors are the thingys that look like a floodlight with black glass.

aardvaak

Johno100 wrote: »

Do you mean like this?

Yes.............

Jackmydad

Wrong thought detectors, put there by the thought police.
Don't even think about it!
Whatever it is!

Johno100

aardvaak wrote: »

Yes.............

All explained here.

https://www.chroniclelive.co.uk/news/north-east-news/could-weird-boxes-top-traffic-13877951

Seems they are called magnetometers, they are used to monitor traffic flows and as an alternative to induction loops in the tarmac.

NaughtiusMaximus

Johno100 wrote: »

All explained here.

https://www.chroniclelive.co.uk/news/north-east-news/could-weird-boxes-top-traffic-13877951

Seems they are called magnetometers, they are used to monitor traffic flows and as an alternative to induction loops in the tarmac.

Whoop, I was right for once