Braking to a stop is the best option (which is not always available, yes). Emergency braking to half the speed is the difference between "8 fatalities" and "hun

Braking to a stop is the best option (which is not always available, yes). Emergency braking to half the speed is the difference between "8 fatalities" and "hundreds of fatalities"; Ek=mv^2 - note that velocity squared*. Case in point: https://en.wikipedia.org/wiki/2008_Stud%C3%A9nka_train_wreck https://en.wikipedia.org/wiki/2008_Stud%C3%A9nka_train_wreck - train hits bridge at 90 kph instead of 135 kph; a 2/3 speed, but less than 1/2 the kinetic energy.