I can only speak to my state. For proof I will provide this link.
https://www.dnr.illinois.gov/conservation/wildlife/Documents/JTF Information Sheet 2-2-09.pdf
Not saying I agree with process, just pointing it out.
Interesting. You got called out and came through, it seems from a cursory reading anyway.
Biologists use harvest data all the time so I don't know why road kill stats could not be used, especially east of the Mississippi where you can't walk more than a few inches without crossing a road.
But I will never believe that insurance companies would use their vast power to influence government. We all know they would never do that. Besides, they simply care about human life lost to deer accidents and could not care less about payouts. It's not a money thing. It's the humanity!
It wouldn't help in the vast roadless areas out west though.
"Why use deer/vehicle collision data to assess Illinois’ deer herd?
The JTF recommended using the rate of deer/vehicle accidents for a number of reasons.
Biologists throughout the Midwest have routinely utilized accident rate information as an index
to deer, and other wildlife populations, for many years. Note that this is the RATE of accidents,
not the raw number of accidents, so it takes into account that counties with a lot of traffic can
have a lot of accidents without having a significant number of deer. It also accounts for changes
in the amount of traffic over time (from year to year). As a result, this accident rate serves as an
index to deer population size, functioning in a manner similar to spotlight counts and many other
commonly used population indices. That is why there is such a difference between the top 10
counties on a list of the total number of annual deer/vehicle accidents versus a list of the rate of
accidents – many Illinois counties that have a high number of accidents simply have a
tremendous amount of vehicular traffic. Since deer/vehicle accidents and the amount of traffic
are tracked every year by the Illinois Department of Transportation, this was an index that was
already available statewide at no additional cost; it is straightforward and easy to understand;
and it is data that is collected by a neutral party with no stake in deer management. Most people
have difficulty visualizing what 20 or 40 deer/mi2
(or 10,000 deer in a county) is like, or whether
those numbers would be problematic for farmers or motorists, so the JTF recommended using
the risk of deer collisions as a more meaningful objective. "