From: Sean H. Breheny <shb7@CORNELL.EDU>
>
> "When do I push the emergency rocket button?"<G>)

That question comes up with the existing systems. Maximum braking skids the
wheels,  quickly wearing flatspots on them. So, the engineer is thinking,
"I'm going to hit that idiot parked on the crossing anyway? Why screw up
several hundred railcars in the bargain?"