Clem 7 Speed Camera's..Police Caught Out!!!!

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I know this another speed camera posting and I will be doggy do do'ed again ..but ...This another reason why I hate speed cameras, when Police can do this, But this time they didn't get away with it!!!
Courier Mail 29/07/2011
The number of speeding fines issued by fixed cameras in the Clem7 Tunnel soared by almost 50 per cent in May after a law was quietly changed.

More than 3600 fines were sent out to drivers who used the tunnel in May, compared with an average of 2100 in each of the previous nine months.

More than 500 were later withdrawn when it was found a roadworker had erected speed signs in the wrong place.

Police revealed to The Courier-Mail yesterday the reason for the sudden upswing in speeding offences detected in the tunnel was a regulation change in section 210c of the Transport Operations Act that allowed the enforcement of variable speed limits.

Before the change, police could not enforce limits lower than 80km/h displayed by variable speed signs in the Clem7 without manually adjusting fixed cameras each time.