Martin Smith wrote:
The Galileo system won't be operational until 2008, if they hit their schedule. It's folly to base your scheme on something that doesn't exist yet.
Do you mean like commercial off the shelf cheap, secure, triple biometric ID card readers ?
When you switch on a GPS it takes several minutes to acquire a signal. If you can't see enough satellites it could be longer or it could fail to get one. What happens then? Can you drive for free or does it disable the ignition?
Perhaps the device will be decrementing its internal ca$h counter at the maximum rate e.g. £1.34 a mile unless and until it gets a position fix that you are in a cheaper zone, just like the Oyster Card on the London Tube.
If it is wired into the odometer like a tachograph, then even poping down to the local shops could cost you several pounds.
How is the data going to be uploaded from the cars? Again there are rural areas where whatever infrastructure they plan to use (if they know) will be totally uneconomic to install.
150,000 lampposts or another forest of mobile data masts that people can object to being sited near their schools etc.
Driving without insurance will be easier because you don't need to display a tax disc.
Your insurance premiums will go up as the insurance companies are sued to recover excess Road Tolls caused to other drivers by delays and traffic jams which trap them in a motorway etc. until the peak charge time kicks in.
You are making the assumption that the vast increase in Automatic Number Plate recognition and the new direct data sharing "gateways" between DVLA and Insurance companies will not continue to expand.
I've worked in software for a long time now and when I come across this attitude that specifying requirements is like visiting a magic wishing well it usually means the project is doomed.
It is easy to be profligate with taxpayers money