"Unless they've got the buses access plans from the suburbs to the railway station all sorted ... people will see the extra charge, and that it'll be more cost effective for them to go straight to Wellington.
"At the end of the day they want to encourage public transport, but if they make it more expensive that will be counterproductive."
But Living Streets Aotearoa spokesperson Mike Mellor says free carparks at train stations subsidise car-use, and the plan is the right idea.
"Park and ride is actually a very expensive way of increasing public transport usage by not that much. Even a full car park is barely a trainload of passengers, for instance.
"It costs a lot of money, it encourages local car use, and it means that that land is not available for productive purposes like transit-oriented development where you build productive buildings round transport hubs. And it also often makes a really unpleasant environment to access the station by any other means."