They will never work 100% because there are drivers who think that rules are only for other people.
You make these misfits pay dearly.
Reporters from The Sunday Telegraph(Sydney) using radar guns conducted speed checks at 4 school zones over 2 days and caught 1755 motorists exceeding the 40 km/h limit.
How many of these were unaware that it was school zone time?
How many drivers speed at "flashing light " controlled school.zones?
The Newspaper article also mentioned Mr Tripodi the roads minister and the idea of "inviting local businesses to help fund the ((flashing light) project."
I'll e-mail him an idea I had on that subject, and see what he thinks.