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City health study

Local councils can save lives and improve New Zealanders’ health with less focus on cars and a greater emphasis on walking, cycling and public transport, researchers say.

Wellington has the highest level of sustainable travel of the main centres, at 35 percent.

A study led by Otago University in Wellington set out to quantify what would happen if other cities had the same rate, and found there would be significant health and carbon gains.

In Auckland, which has the highest level of multiple car ownership at 55 percent, there would be an estimated 57 fewer premature deaths each year.

Carbon emissions from light vehicles would be 20 percent lower.

The figures for the four other cities in the study were (fewer premature deaths and lower carbon emissions from light vehicles):

Hamilton, 52 and 32 percent; Tauranga, 50 and 27 percent; Christchurch, 31 and 8 percent; and Dunedin, 13 and 7 percent.

The study, published in the NZ Medical Journal, said the different amounts of walking, cycling and public transport use between cities reflected different urban planning priorities over time.

Lead author Dr Caroline Shaw said the health gains were mainly through increased physical activity, but also as a result of reduced air pollution and few injury deaths.

“The cost of preferentially funding infrastructure for cars is high,” Shaw said.

“This research shows we can address carbon emissions while also significantly improving health in cities.”

– NZ Herald

An estimated 55 percent of Auckland households have multiple car ownership.Photo by Nick Reid