Anyone wanting to ski at Mount Ruapehu will have to book a carpark online from next week or use public transport.
The move is to improve road safety and environmental protections following a surge of demand on facilities.
"In the past, we've had some hairy incidents going up [the maunga], where people are trying to fit chains when it is snowing, or going up without chains, falling off the road ... it was just a matter of time," Ruapehu Mayor Don Cameron said.
The change should've been made five years ago, he said, but it would be in time for an expected busy ski season this year.
"We'll have good snow, and we've got another big system coming next week which will dump a lot of snow, so that really ensures the whole winter."
The online carpark booking system for Whakapapa and Tūroa starts on Wednesday, for booking from next Saturday.