Allowing citizens to salvage road kill has it’s dicey issues, ranging from human health, human safety and enforcement issues. Idaho is plunging in with expanded road-kill salvage rules in the hope that letting people stop and pick up dead animals from the side of the road will lead to better data about where and when animals are being struck by cars.
There are a lot of caveats. See the press release for details.
It’s on clear what kind of data will come from limited access highways, since, as the press release points out, those roads only allow emergency stopping, and salvaging road kill is not an emergency.