Dangling CDs ....!!!

[6RCS27@CW]

Having recently had the misfortune to drive in central London I noticed that there were several cars with CDs hanging on string from the rear view mirrors.There is obviously a logical reason for this and I have been told that it has something to do with reflecting the beam from laser speed guns as used by the "local constabulary" [their words not mine..!!] .
can someone shed any light on this for me please?
Thanx in advance.

[Brooksy]

Sounds like an alternative to the old furry dice to me!

[TWR]

The Disk deflexts the Mobile/Speed camera beam, You will notice a lot of these on HGV's. T.W.R. Ex H.G.V. Driver.

[sddsddean]

Further to TWR's post...it doesn't work!!!

[Toureman]

They are used to signify that the driver is a pratt.

[markysngc]

is the pratt level determined in anyway from who's cd it is?

[markysngc]

also isn't it against the law to have anything hanging from your rear view mirror? and even on a common sense level surely having a reflective item hanging just next your view line when driving can't be a good idea!!

[bigboots]

Some non christian religions have these, no idea why

[david1702198]

if it caused a restricted view then yes it is illegal as it would fail an mot, even a magic tree hanging from the mirror would probably fail most times, however !! and this is the good bit- its not even a legal requirement to have a rear view mirror!!!as long as you have the drivers side wing mirror and either or the rear view mirror or the passenger wing mirror it will pass an mot!!!!!!

[Zax47]

Supposedly to "deflect" the beam from a laser speed gun. DOESN'T WORK

Proven to be a complete load of cr@p in a real-life situation by the guys on MythBusters on the Discovery channel.

Think about it - why would a tiny circle of reflective plastic deflect a beam which would otherwise be reflected by a HUGE great car!! Current laser speed gun technology can work over distances up to a mile (line-of-sight).

[londonpaul]

Im sure i read or was once told that some faiths have their religious books on the CD for example the Quran. This is so they have their religions book everywhere they drive. As for the speed laser i think they often use the reflection from the number plate so the CD wont make a diference.

[LAW_DROP-OUT]

solar power ?