Perhaps the GPS savvy would know more about
* Differential GPS via FM receiver
This finer grained detail idea might interest you:
This might interest you / pour your votes into:
Phone-fascism is a state issue. Not all states treat citizens like criminals/imbeciles.
there would need to be logic to recognize one car is not 'increased traffic' in the lane
GPS polling would need be reduced for those vehicles not capable of accommodating multiple charging leads.
It would be simpler for those not fond of personal transportation to cherish their respective warm-fuzzy for carpooling :P
combine this with trailing/leading police
to create 'target' overlays on the map based on signal density and confirmed coincidence
Waze could also use the accelerometer to
+ mark sections of certain lanes as undesirable.
+ mark curves [turns / bends] where most people sharply decelerated
+ identify lane markers!
Another crafty use of the accelerometer is dead reckoning:
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