Silencing the shriek
Railway noise experts have tracked down the cause of squealing noise from the Matangi trains and suggested solutions.
Residents have reported piercing squeals coming from the trains as they pass, particularly on the Johnsonville line.
Wellington Regional Council public transport manager Wayne Hastie’s report to the council’s economic wellbeing committee on September 13 said KiwiRail engineers would begin trials as soon as possible and by November at the latest.
Porirua representative Jenny Brash said screeching from the trains had also been reported to her by residents of Steyne Avenue in Plimmerton.
After the meeting Dr Hastie said wheel squeal from trains was relatively common around the world.
‘‘Having said that I think there is an issue on the Johnsonville line,’’ he said.
One solution was to minimise the noise at the wheels with devices to alter its frequency.
Another was to reduce the friction between the wheel and rail, in some places by spraying water.