Deer are regularly killed by drivers, we call it roadkill.

Is it really legal to cross an interstate on foot? You're not even allowed to drive slow vehicles on big highways in some countries, let alone walk on them. It's dangerous, that's why there are usually barriers to discourage you from doing so.

This is very different from an accident on roads meant to be shared between cars and pedestrians and cyclists

Do we know if the person ran onto the road or if the driver actually had time to react?