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Speed limits too high on most roads, NZTA estimates

Ben Strang, Police and Emergency Reporter

A Transport Agency (NZTA) tool shows 87 percent of speed limits on New Zealand roads are higher than is safe.

a piece of motorway
with speed cameras

The agency's Mega Map's risk assessment tool suggests only 5 percent of the open road should have a speed limit as high as 100km/h. Photo: RNZ / Alexander Robertson

The agency's online risk assessment tool, Mega Maps, uses a range of factors such as road width and stereotype, shoulder width, roadside hazards and alignment to calculate the safe and appropriate travel speed.

Mega Maps suggests only 5 percent of the open road should have the current 100 kilometre an hour speed limit, and in most cases a speed of 60-80 km/h should apply.

For most urban areas, Mega Maps suggests the safe and appropriate speed would be 30-40 km/h

The Mega Maps tool is used by NZTA and councils as a guide for deciding on new speed limits.

Road Transport Forum chief executive Nick Legget said with the government wanting to crack down on the road toll, he's concerned speed limits could drop across the country.

Mr Leggett said that would severely restrict the movement of freight and the productivity of New Zealand's economy, as well as having a major impact on the everyday lives of drivers.



Last month Transport Minister Julie Anne Genter said the government's Vision Zero road safety plan seeks to significantly drop the number of road deaths, and one tool was to reduce speed limits.

"We wouldn't have a blanket reduction," Ms Genter said at the time. "What is important is that we're going to focus on the most dangerous roads, revising them to have a safe and appropriate speed limit, and making it easier for local councils to get a safe and appropriate speed limit."

"It is about sadly slowing New Zealand down and potentially making it a lot less productive" - Nick Leggett duration 7:06
from Morning Report

Click a link to play audio (or right-click to download) in either
MP3 format or in OGG format.

Mr Leggett, whose organisation represents the trucking industry, said the suggestion of lowering speed limits was about slowing New Zealand down and potentially making it a lot less productive.

"The speed limit is 90 for trucks, and the worry for us is you make that 60 you are making it much much harder for the New Zealand economy to be productive for people to be able to move their goods around the country - and the economy will suffer."

Listen to RNZ transport reporter Ben Strang speaking to Corin Dann duration 8:01
from Morning Report

Click a link to play audio (or right-click to download) in either
MP3 format or in OGG format.

The MegaMaps tool also looks at the median travel speed on each road, based on data purchased from TomTom.

Large parts of State Highway 1 are signposted at 100 km/h, but the median travel speed is between 85-89 km/h.

Mr Leggett said New Zealand's population was too small to be able to subsidise public transport as other countries do, so it relied on roads.

"What we've seen in the last couple of years is a de-funding of the roading budget," he said.

He said speed was one factor in safety - and backed lowering the limit on dangerous spots - but said New Zealand should prioritise improving the quality of the roads.


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