[spetznaz]

Nice. Sorry, but I abhor traffic cameras. Nice to know that math (or maths, if you use Queen's English) is still helping out the world one formula at a time.

[Peter vE]

NSW's weekly take from the cameras is more than $1 million.

There's the key line in the story.

[glorgau]

The set of "different sequences" that can be stored with the same MD5 key is finite. What the guy should have had to prove is that the speed number presented to the court was possible given the actual speed that he claimed to have been traveling.
All that said, good for him in coming up with a novel arguement for beating a traffic ticket. ;-)