Si­lenc­ing the shriek

Kapi-Mana News - - NEWS - By JIM CHIPP

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.

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