It doesn't say it in this article, so I can't RTFA you ;) but in others that I've read it's stated that 90% of the energy goes back into the grid. The plant itself is very "green".

Most state governments have huge deficits because of health care costs these days. Extra revenue from speeding with the added benefit as a deterrent seems like a win-win to me. It's like being able to choose to not pay your taxes. Drive safe, and you get more money to spend, drive like a moron, give up some cash. I also think speeding fines should be factored by kinetic energy. That dicates possible damage, and would increase the fine at all speed levels for recreational tank, errr, SUV drivers. I see far too many people being very very careless on the road. In the US over 10,000 people die on the roads every year. If you are under the age of 50 in the US and you die, you will be killed in a car. Driving in your car is the most dangerous thing you will ever do in your life by a factor of 1000. I will never understand how people can act so carelessly when so many lives depend on their actions.