Wellington train drivers are to strike again on Friday, Metlink says.
The Rail and Maritime Transport Union went on strike earlier this month after a breakdown in talks between it and rail company Transdev over workers' contracts.
Metlink said the strike would begin in the capital on Friday at 2am and last until midnight, with normal services resuming on Saturday morning.
There will be no replacement buses but normal bus services would be running, it said.
The Transport Agency said Wellington commuters should plan their journeys, be patient and allow extra travel time during the strike.
"Commuters who usually use train services are more likely to use their cars instead and that's going to put increased pressure on the roads in and out of Wellington," the agency's regional transport systems manager, Mark Owen, said.
He encouraged commuters to consider making their journeys earlier or later than normal to help ease congestion.