New Zealand's Infrastructure Commission has looked back over 150 years of public construction to remind people how old some of our buildings and roads actually are.
A study just released shows two thirds of this country's roads existed in 1925, but less than 2% were paved and the majority of hospitals and schools were built in the 40 years following World War 2.
It also tracks how much this country has been spending on infrastructure overtime.
New Zealand is committing more money than ever to building, renewing and maintaining networks.
But in relation to the size of this country's economy, investment in public construction and networks is said to be relatively stable.
The Infrastructure Commission hopes that getting a clear understanding of the age of infrastructure networks, will help with prioritising spending on maintenance and replacements needed for the future.
Peter Nunn, the General Manager of Strategy at the Infrastructure Commission, joins Kathryn to discuss what can be learnt from the report.
