“ENLIL is a roadside turbine designed to capture wind power from highway traffic.”
There’s also an article on the technology from 2019.
I’m thinking even if we drastically reduce the number of cars, get rid of the wide-lane highways, and use just buses, trains, and planes to generate the wind, it would still be useful.
I would be curious as to how this affects airflow of a vehicle moving past- does it increase the drag of vehicles passing?
Signs point to yes. Pretty sure this is well debunked. Energy available is negligible and the disturbance to nearby traffic is probably measurable.