Goods train don't go above 100 at all, everyone knows that, u too know it.
they run below 70/80 only and they too have distance braking.
and now a days, when the braking system in Wagons are being modified, its quite possible.
but to bring to a sudden halt will eventually follow up some derailments, coz even if AEB is slammed...
more... down, it'll take almost couple of meters for the entire train to stop.