A new electronic ticket system faced its first big test on trains in rush hour in Auckland on Monday morning.
The AT Hop card went into use on the rail network at the weekend.
Auckland Transport says there have been no real problems, and extra personnel will be at stations this week to help out.
Nearly 22,000 people use the trains in Auckland on weekdays.
The $100 million ticket system will be extended to ferries next month and later buses.
Only about 10% of passengers arriving at the downtown Britomart terminus on Monday morning were swiped through the electronic gates.
Most were still using 10-trip paper tickets, or buying cash fares from new ticketing machines.