Tranz Metro was Greater Wellington's passenger rail service. It extended from Wellington Railway Station as far as Paraparaumu and Masterton.
See http://newzealand.fandom.com/wiki/Talk:Tranz_Metro
The operating contract later went to another company and the regional council now uses its own brand, "Metlink", and owns the trains. The Paraparaumu line has been extended to Waikanae.