@p.j had an idea to build a thing which could count cars, measure speeds, and perhaps distinguish HGVs and the like, to help residents make a case to authorities, in case some kind of traffic calming seems warranted.
So we discussed it at the meetup today, and @Joe helped with some pointers and even ran up some example code.
Just possibly a Raspberry Pi with a camera could do enough local processing and collect events for later analysis, without needing to retain a full video stream.
There are several aspects to look into: technical, organisational, procedural - perhaps this topic can serve as a place to keep notes and pointers.
There are some interesting-looking starting points and references:
Detect Speed with a Raspberry Pi, Camera and OpenCV
Real-Time Vehicle Tracking and Counting Using YOLOv8 and SORT with OpenCV