Patrick Corridon over at Metro Count shared the below letter with me. You can read more here.
It turns out, one of their customers had a tube counter out on a gravel road south of a fatal crash location. MetroCount was able to extract data on the speeding vehicle that ran into and killed a motorist heading in the other direction. I assume it was a pretty low volume road since it was gravel, which would make picking a specific vehicle out of the data download straightforward.