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AAP
AAP
Politics
Maureen Dettre

Investigation under way into Sydney train failure

A communications issue meant Sydney commuters waited up to 90 minutes on trains and platforms. (Dan Himbrechts/AAP PHOTOS) (AAP)

NSW transport engineers are investigating why the Sydney train network ground to a halt in the busy afternoon peak period, stranding commuters and causing widespread transport chaos.

Transport for NSW chief operations officer Howard Collins says the rail network's radio system that controls communication between trains and the rail operations centre failed at 2.45pm on Wednesday, affecting about 250,000 commuters.

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