A light rail network could link Wellington's CBD with the city's south and east.
The logistics of running light rail from Wellington Station to Kilbirnie will be assessed in a public transport study, due to be completed by April.
Greater Wellington Regional Council chair Fran Wilde said stretching the study to include the southern and eastern suburbs makes good sense, as future demand in those areas is expected to be high.
She said it is imperative that Wellington's public transport spine meets future travel needs as the city and the region change and grow.
Other options to be considered by the study include a bus only corridor, or improved bus-priority lanes.