It would seem to me that a speed limiter installed on the train would have prevented the accident. Lets say for the sake of argument that Amtrak operates a 1000 trains a day.
The cost of a speed limiter is around $300, so we’re talking $300,000.
I’m sure the 1.3 billion budget could cover it.
Where did you get that $300 number? Also by "speed limiter" do you mean automatic braking system?