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Auckland commuters are set to have their travel plans derailed for large chunks of the coming year.
KiwiRail and Auckland Transport yesterday announced plans for a major rebuild to rail lines across the city which is says will "future proof" the network for decades to come.
A number of train lines will be shut for months next year, while the tracks are upgraded.
Thousands of commuters on the Onehunga, Southern and Eastern lines will have to catch buses instead.
But the news has been described as a bombshell - some public transport advocates say this will send tens of thousands back into their cars. And business associations are worried.
Kathryn speaks with David Gordon, Kiwirail's Chief Operating Officer - Capital Projects & Asset Development and Amanda Wellgreen, Town Manager for Onehunga Business Association.