Heh...such an intrusion into our privacy could one day become the first step toward privatization of the roads.
That's already happening up to some height by having corporations "invest" in infrastructure like tunnels, highways in exchange they are allowed to ask for a fee before one can make use of them.
The funny thing which seem to always sell people on privacy invading devices / services etc;
- brings safety
- brings comfort
- brings profit
Until policies, management, governments (etc) change and use it for something else if it wasn't done already in the first place.