caspermike: it's already done but thats not the point
The roads and routes have already been digitized, but that's not the point. On the highways, where we are all going the same speed , the same direction etc etc. computers could do a better job ie; get us there sooner by optimizing all the variables and taking 100,000 dumasses out of the equation.
For example, when we're all stopped because of something, rather than the first guy going , then then next guy going but putting his brake on then the third guy finally wakes up , etc. The whole group could move as one, and when you get to your dirt road, or your hometown, you bow out of the virtual train and proceed to wherever.. and you can bring your dog and your kayak. This is a software problem.... and I'm not talking about computers ,I'm talking about the human brain allowing this to happen.