Slower Tube trains to ‘iron out’ tracks causing noise complaints

Tube trains could travel at slower speeds to “iron out” bumps in the track that cause excessive noise on the London Underground.Transport for London is to trial a “self-correcting” system after spending up to £50 million on partly failed efforts to reduce the “screeching” and rumbling suffered by passengers and residents.Five sections of the Northern line will be targeted from early next year — meaning slower off-peak journeys between Friday and Sunday.