Auckland primary school students promote underwater trains with Kiwi-shaped carriages as future travel option over Waitemata Harbour

Would you enjoy riding on an underwater train with carriages shaped like a Kiwi to travel across Auckland's Waitemata Harbour?

It's just one idea that's been presented to Waka Kotahi New Zealand Transport Agency (NZTA) by a group of budding engineers at Bayfield School in Herne Bay.

A class of Year 5 students at the primary school were tasked with creating their vision of what future travel connections over the harbour could look like.

NZTA has been engaging with primary schools to get students and adults talking about the Waitemata Harbour Connections project.

Officials are currently asking for Aucklanders to have their say on the project online, to investigate options for people wanting to drive, walk, cycle, transport freight, take the bus or travel by light rail across the Harbour.

A short list of options will be announced mid-next year.

Waka Kotahi said the existing Harbour Bridge is coming under increasing operational pressure which affects the resilience of the bridge and the wider network.

The project is expected to take more than 15 years to design and build, meaning the Year 5 students at Bayfield School could be aged over 24 when it's finished.

The designs they've created include underwater glass tunnels, a suspension bridge, supplement bridges and a train with carriages shaped like a Kiwi.

There were also engineering feats, like a bridge made with spaghetti.