My opinion? The money collected from this goes towards the State's General Fund. Why not focus efforts/penalizations elsewhere (ie increasing fines for other misdemeanors, etc.), other than getting speeders, to add to this pot? I believe it will be a wasted effort.
The 75 mph limit on 2 lane roads make sense. The issue I have is with the 85 mph limit on the interstates. The jury is still out, but I highly doubt that this will curb the behavior of chronic speeders. If you are doing 85 mph on the interstate here in Atlanta, relatively speaking, you are typically going faster then some but still slower then others. The reckless driving laws were sufficient enought, already.