Tranz Metro is the suburban rail operator in Wellington, operating a five-line 154-kilometre network.
KiwiRail provides the Tranz Metro service under contract to the Greater Wellington Regional Council.
An average of 35,000 passengers a day use Tranz Metro services.
The company is often criticised over the performance of its services and KiwiRail chief executive Jim Quinn has admitted communication with passengers was poor.
Figures released in October 2010, show all lines are still failing to reach the target of 95 per cent of trains arriving or leaving within three minutes of scheduled times.
Under its terms of carriage agreement, Tranz Metro is required only to get passengers from A to B, not within a certain time frame - meaning there is no comeback for passengers.
Tranz Metro saw the terms of carriage agreement as the "minimum standard" - which was the reason it aimed to have 95 per cent of trains arriving and leaving within three minutes of the scheduled time.
The network is in the middle of a $500 million upgrade, which will see new trains and improvements to existing trains, tracks and signals.
Work started in 2008 and is due to be finished in late 2010.
All lines originate from Wellington Railway Station.
The Dominion Post