> The Federal Railroad Administration estimates that were PTC to be installed on thousands of locomotives and tens of thousands of miles of track, it would prevent perhaps 2 percent of the approximately 2,000 collisions and derailments, preventing seven deaths and 22 injuries annually.
https://www.washingtonpost.com/opinions/george-will-positive...
(That quote is the first I could easily find, and it comes from a George Will article. If anyone suspects ideological distortion, I think they could find more objective sources that will say basically the same thing.)
For comparison, the FDA, EPA, and Department of Transportation use ~$9 million for the statistical value of a human life. If it costs more than that to save, it's considered unreasonable and the funds could be better spent elsewhere.
https://en.wikipedia.org/wiki/Value_of_life#Life_Value_in_th...