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Standard safety intervention resources

We’re improving road safety through various infrastructure and speed management solutions. These improvements can prevent crashes happening, or if a crash does occur, they can stop people from being killed or seriously injured.

Making New Zealand's roads safer

People make mistakes

people make mistakes

People make mistakes. This shouldn't cost a life.

We all make mistakes, but there are changes we can make so simple mistakes don’t result in someone being killed or seriously injured on our roads.

Waka Kotahi NZ Transport Agency is installing proven safety interventions on New Zealand’s highest risk roads as part of the Road to Zero road safety strategy.

Safe speeds

Speed management

Faster speeds reduce the time you have to react to a mistake, yours or someone else’s.

When speeds are appropriate for the road, simple mistakes don’t need to end in tragedy.

We want everyone who uses our roads to get home safely. There are a range of things we can do to make the road safer such as putting in signs, safety barriers and rumble strips. But making sure the speed limit is safe and appropriate for the road is still one of the best ways to save lives on New Zealand roads.

This is part of the Waka Kotahi NZ Transport Agency’s contribution to Road to Zero, New Zealand’s road safety strategy.

For more information on safe speeds:

The Sign of a Safe Speed

There are a number of factors that go into setting safe speeds on our roads. Including the number of people and travel modes using the road, the function and features of the road and its surrounding environment. All these things determine what a safe speed should be.

Flexible road safety barriers

Flexible road safety barriers are life savers.

When safety barriers are fitted along the side and centre of the road, they can reduce the number of people killed or seriously injured in crashes by 75 percent.1

Barriers catch you before you hit something harder like a pole, tree or oncoming car.

If you hit a flexible barrier, the steel cables flex, slowing down your vehicle and keeping it upright. They absorb the impact so you and the people with you, don't.

Flexible road safety barriers

Watch the video below to learn more about how flexible road safety barriers work.

Side and median barriers

Barriers are life savers.

They stop you before you hit something harder – like a tree, power pole or oncoming vehicle.

Rumble strips

Rumble strips could be the difference between straying off the road or staying on it.

These raised markings give off a rumbling sound when you drive over them. This gives you a wake-up call if you stray across the line. 

Rumble strips can reduce fatal run-off-road crashes by up to 42 percent.2

Widening the centrelines

More space between lanes can reduce serious crashes by around 35%.1

A wide centreline means more space between you and oncoming vehicles. It’s about making sure simple mistakes don’t cost lives.

Signs and road markings

Signs and road markings warn people of risks further down the road like intersections, stop signs or tight corners.

The right signs in the right places make a big difference in preventing crashes - signs warning drivers about a corner can reduce crashes by up to 57 percent.2

Improved intersections

Our intersections can be dangerous places, but there are a range of things we can do to make them safer.

Turning lanes, better road signs or Intersection Speed Zones are just some of the improvements we can make.

We can cut back trees so it's easier to see other vehicles, or improve the road surface so drivers are less likely to skid. 

17 percent of deaths and injuries happen at rural intersections.3

Intersection speed zones (ISZ)

Making turns safe on busy roads

Intersection speed zones help reduce speeds around intersections, making it easier and safer for people to pull into or out of a side road.

You’ll have more time to react to mistakes and avoid collisions, so crashes are less likely, and the outcome is less severe, if a crash occurs.

The intersection speed zone for safer turning

Watch our video below on how intersection speed zones work to make our roads safer.


Give way for safer intersections

Roundabouts reduce speeds, making it easier for you to choose the right time to enter flowing traffic.

Lower speeds significantly drop the chances of a serious head on or side impact crash. This means the chances of being killed or seriously injured is reduced by up to 60%.1

Traffic lights and urban traffic signals

Cross city streets safely

Urban intersections can be very busy places, with lots of people driving, walking and riding through them.

Changes to the phasing and timings of traffic signals can help people move more safely through intersections, reducing the number of people killed or seriously injured by up to 25%.1

Standard Safety Intervention Toolkit [PDF, 977 KB], published February 2019, Waka Kotahi NZ Transport Agency. First edition. NZBN: 9429041910085.

High Risk Rural Roads Guide [PDF, 3.6 MB], published September 2011, Waka Kotahi NZ Transport Agency. First EditionISSN 978-0-478-38038-5 (online).

High Risk Intersections Guide [PDF, 5.2 MB], published July 2013, Waka Kotahi NZ Transport Agency. ISBN: 978-0-478-40780 (online).