Google Maps

[supapapa]

On Google maps just north of Broadmoor ther is a grey circle, which when you zoom is appears to be a traffic roundabout.
Anyone know what it is please?

[ABerrant]

I presume you are looking at the Crowthorne site of TRL (Transport Research Laboratory).

http://en.wikipedia.org/wiki/Transport_Research_Laboratory

http://www.trl.co.uk/

[EcclesCake]

A new roundabout has recently been built for the access road to the new Broadmoor facility.

[Old_Geezer]

It is a Google censorship circle. It's where the Illuminati plot to control everything.
;-)

[sddsddean]

As ABerrant's answer, its TRL. The roundabout on the grey circle is an experimental layout to make roundabouts safer for cyclists. When they tried it out on the site using 'real' cyclists and drivers, they found the cyclists just cut the corners rather than going round the narrow outer circle which you can see. Another idea bites the dust!!