"Drivers will get charged for how many miles they use the roads, and it's as simple as that," says engineer David Kim.

Kim and his team at Oregon State University equipped a test car with a global positioning device to keep track of its mileage. Eventually, every car would need one.

"So, if you drive 10 miles you will pay a certain fee which will be, let's say, one tenth of what someone pays if they drive 100 miles," says Kim.


what about that part though? i thought that was referring to the mileage tax, with the gps hookups in cars...all new models have them...and cars for at least 10 years are equipped with them too.