KiwiRail spokeswoman Jenni Austin said the driver of the train was now off work.
"That's never a pleasant experience for any of our staff to be involved in something like that. It is a stressful situation."
Drivers were usually relieved of their duties for three days and given further time off if needed. They were also offered counselling, she said.
"It's always a terrible experience for [drivers] because a train as big and heavy as that one would've taken 1km to bring it to a stop. There's just nothing our guys can do."
Hearing if the victim was doing well would "always help" drivers trying to recover from the shock, she said.
Canterbury DHB media advisor Amy Milne said the family of the woman had requested completed privacy so her condition could not be reported.