It's normal cars regulated as tractors, because at some point it was considered useful to use cars as tractors. But as you can now convert them electronically, they are used at scale for convenience. So it like driving behind a tractor, but there are many tractors going back and forth to school, the supermarket and friends in rush hour and on weekend. All day, every day. And the drivers are very overrepresented in not behaving well on the road.
Here are some examples.
https://youtu.be/EprqvxTF5vI?t=92
https://youtu.be/RfhIPGVDQ2Q?t=461
https://youtu.be/wTkM5Cknobc?t=509