Skip to main content

New Zealand’s smart motorway opens

Commuters heading north on Wellington’s urban motorway will now get a smoother trip as the new lane is fully opened and New Zealand’s first smart motorway is turned on in the northbound direction. Using variable speed limits, which will be adjusted in real time in response to changing traffic conditions, the smart motorway will pace vehicles to smooth the traffic flow. Officials say this will result in safer journeys with more predictable travel times. It will also free up nearby roads for better public
July 15, 2016 Read time: 2 mins
Commuters heading north on Wellington’s urban motorway will now get a smoother trip as the new lane is fully opened and New Zealand’s first smart motorway is turned on in the northbound direction.

Using variable speed limits, which will be adjusted in real time in response to changing traffic conditions, the smart motorway will pace vehicles to smooth the traffic flow. Officials say this will result in safer journeys with more predictable travel times. It will also free up nearby roads for better public transport trips and for pedestrians and cyclists.

There are two types of signage on the motorway – variable message signs display information and messages, while lane control signs show either the speed limit or an X if the lane is closed.

Detectors and radars count vehicles and measure their speed. The smart system calculates the rate at which the road is getting congested, factors in what is likely to happen based on traffic records that are continually updated and monitored, and then adjusts the speed limit to pace the traffic and delay queues being formed.

The smart motorway reduces congestion by smoothing the traffic flow and maximising the number of vehicles that get through. As traffic builds, the system lowers the speed limit which allows vehicles to travel closer to each other, meaning more vehicles can fit on the road at any one time.

Related Content

  • Low-costs solutions to improve pedestrian safety
    May 8, 2015
    David Crawford welcomes low-cost safety initiatives for pedestrians in America. Some 10 people die each week in accidents on crosswalks in the US, that’s more than 10% of all pedestrian fatalities in road traffic incidents - the number of which is running at a five-year high. Ensuring crosswalks are safe is key in supporting the growing enthusiasm for walking as a travel mode. In the last decade of the 20th century, numbers walking to work in the US fell by 26%; while, as recently as 2012, Americans were e
  • Safeguarding cities against wrong-way drivers
    June 10, 2024
    Thermal imaging and artificial intelligence analytics provide the best path towards preventing deadly auto accidents, explains Stefaan Pinck of Flir
  • Counting the environmental costs of ITS deployment
    October 29, 2015
    David Crawford looks at the latest thinking about calculating the benefits associated with the environmental side of ITS schemes. The penny is dropping that some environmental costs “are being shifted outside the traditional bounds of evaluation methods” for ITS-based road transport projects, according to researchers at the UK University of Leeds’ Institute for Transport Studies.
  • Cloud keeps UK traffic on the move
    November 23, 2021
    Sopra Steria is introducing the new digital infrastructure for National Highways' NTIS