[franga2000]

Nobody claimed any study found that zero percent speed tolerance is beneficial. They said speed limits in general. You're arguing against something nobody ever said.

And no, it's not strictly "if a truck can safely do X then a car can do X+Y. It's not just about physics. There are more cars than trucks, so speed limits matter more for cars. A truck getting into a crash is worse, but less likely. Trucks also already have lower limits in many places, so this isn't even relevant in most places.

Here, truck speed limits: https://dhl-freight-connections.com/en/business/truck-speed-...