KiwiRail chief executive Peter Reidy says Auckland's transport network is at "crunch point" with demand from freight and passengers increasingly at odds.
Reidy said KiwiRail was working with Auckland Transport, which contracts train operators to run Auckland's commuter train services, and the New Zealand Transport Agency, responsible for an integrated transport system nationwide, to build more network resilience.
"Auckland is at crunch point and if we don't get it right, it's really going to cause problems," he said. "We can't build our way out of this."
On Auckland's rail network, passenger services every 10 minutes are clashing with an increase in freight services to and from the port and inter-modal transport hubs, he said. Nationally KiwiRail handles 25 per cent of the country's exports and over 2.7 million passenger trips.
Reidy said the Auckland Transport Alignment Project, which released an interim report in June on developing Auckland's transport system over the next 30 years, hadn't really considered the rail freight challenge.