Closure of the Kapiti rail line has exacerbated holiday traffic along the Kapiti Coast as would-be train passengers have been forced to travel by bus on congested roads.
The line between Porirua and Waikanae closed on Boxing Day and is not expected to reopen until Tuesday, January 3.
KiwiRail has defended the closure of the line telling Fairfax it needed to fix "years of deterioration" on the tracks.
The company told Fairfax the work was planned and consulted on over many months, and the holiday closure fell at a time when it would have the least impact on commuters.
Repairs include a revamp of the tracks at Paekakariki, where speed limits at the State Highway 1 intersection have been cut to just 30km/h.