"They will be off for several days."
He said the driver would not have been aware something had happened and it was not until the train was called to a halt by police after it crossed the Ngaruroro River rail bridge approaching Clive, 4km further down the line.
Mr Miller said the incident was now in the hands of police who would, as part of their investigations, be speaking to the driver.
Police had still not released the name of the woman last night.
Police Senior Sergeant Nick Dobson said the matter had been referred to the coroner.
Meanwhile, comments on Hawke's Bay Today's Facebook page extended condolences to the victim's family.
"She was such a lovely active lady," one commenter said, "much love to the family at this sad time."
"She was a beautiful lady with a beautiful spirit with a crack-up sense of humour," another said.