The parliamentary committee looking into the Fyra high-speed train debacle is holding its final day of public hearings on Friday.

Some 40 politicians, business leaders and experts have been questioned over the past three weeks, during which it emerged the cost of the high-speed train project to the Dutch state totalled €10.8bn so far.

Last to appear will be current junior transport minister Wilma Mansveld. She was responsible for the railways when Fyra trains began operating between Amsterdam and Brussels in December 2012, five years behind schedule.

Earlier on Friday, acting NS chief executive Engelhardt Robbe offered apologies to passengers for all the problems with the high-speed train.

Fyra trains were supposed to travel between Amsterdam and Brussels at speeds of up to 250 kph from the end of 2012 but were quickly withdrawn from service after a string of failures.