Earlier quoted context omitted.
You could get to that just via chokepoints. Examples: The RFK/Triboro bridge in NYC gets 60M crossings annually. I95 at the North/Carolina border gets 14M cars a year. State DOTs publish this information for all interstate and many other highways, so it’s easy to piece see where the flows are. Additionally, DMVs sell all sorts of information, and auto repair and dealerships sell whatever DMV does not. It’s definitely…
holy crap. what kind of info are the DMVs selling? who are the buyers?
New York has a good FAQ. https://dmv.ny.gov/dmv-records/permissible-uses-personal-inf...
Some states are not so good at protecting data, or rely on an honor system: https://dfw.cbslocal.com/2013/02/11/cbs-11-investigates-your...