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The new road through Tranmission Gully is a motorway. This means it has full separation of traffic travelling in different directions via median barriers, interchanges rather than intersections, and no walking or cycling is allowed.

The new motorway will take you through parts of the region you won’t be familiar with, but it is important you keep your eyes on the road. We know it may be tempting to sightsee along the route, but as with all motorways, there is no stopping anywhere on the road, except in an emergency.

Drive to the conditions

Parts of the new motorway are located high in the hills and can be affected by strong winds, fog and even snow or ice. It’s important that you drive to the conditions and adjust your speed and driving accordingly. This includes increasing your following distance.

The variable messaging signs will warn you if there is low visibility, high winds, or other hazards and remind you if the conditions require reduced speed.

Drive to the signposted speed

When the new motorway opens there may be temporary speed limits in place while the chipseal surface settles. Driving too fast may send loose chips flying, driving too slow may lead to sticky chips sticking to your car – make sure you always drive to the sign posted speed.

Leave a safe following distance

As a general rule, in good conditions you should always drive at least two seconds behind the vehicle in front of you.

In other conditions (such as on fresh chipseal or when the road is wet or slippery), you should allow four seconds between you and the vehicle in front.

Count the seconds between when the vehicle in front of you passes a landmark (such a sign or bridge) and when you reach it, to determine your following distance.

Road surface

One third of the new motorway (the steep sections and around interchanges) has an asphalt surface, while the remaining two thirds is chipseal. When driving on fresh chipseal, remember to follow the signposted speed and leave a longer (four second) following distance.

Merge like a zip

If you’re joining the new motorway from one of the interchanges there are ways you can help make the journey smoother for everyone.

If you’re joining the motorway at an on-ramp, use the whole length of the merging lane to get up to speed, look for a gap, indicate and merge safely. If there is other traffic in the merging lane, make sure you leave a gap from the car in front so the merging lane can smoothly ‘merge like a zip’ with the flowing traffic.

If you’re already driving on the motorway, leave a gap for merging traffic. By leaving a gap, you’ll make it easier for traffic to flow smoothly and help avoid congestion.

Know your journey

When driving on the new motorway, there are some locations, such as Porirua City Centre for example, where your journey into Wellington will be different to your route home.

For other locations, the new motorway might not be the most efficient route for you to take. People driving to or from Mana, Plimmerton or Pukerua Bay should continue to use the SH59 (formerly SH1) coastal route.

The Kāpiti Expressway joins the new motorway at Mackays Crossing, so when travelling south to Paekākāriki, it is important to remember to leave the motorway and continue your journey on SH59.

The first opportunity to exit will be at the Mackays Crossing interchange and the second is via the Paekākāriki interchange.

If you do miss your exit on the motorway, do not stop, reverse back or try to turn around – continue driving until the next exit.

When the new motorway is open, you’ll be able to use the Waka Kotahi Journey Planner to organise your journey before you drive. In the meantime, you can use the interactive Wellington network map on our website to see what some of your journeys could look like.

Wellington network map
Waka Kotahi Journey Planner (external link)

What to do in an emergency

As with many roads through rural areas, there are sections of the new motorway without mobile phone coverage. These areas vary by mobile network provider. In an emergency, all phones automatically reroute 111 calls to any available mobile network.

Breakdowns

If your vehicle breaks down on Transmission Gully:

  • Indicate and steer your vehicle as far off the traffic lanes as possible. Most of the motorway has wide sealed shoulders you should use.
  • Turn on your hazard lights to warn approaching traffic.
  • If it’s safe to do so, raise your car bonnet to indicate you have broken down.
  • Wait inside your vehicle if it is safe to do so. If you need to exit your vehicle due to smoke or fire, stay as far left as possible and do not stand on the traffic lanes.
  • At night, turn on your car’s interior light.
  • The motorway radar system will detect your stopped vehicle and a fully equipped incident response team will come to assist you.

Crash or other emergency

Transmission Gully is built to the highest safety specifications. However, if a crash or other incident such as a car fire or medical episode happens it is important to remember:

  • If you drive past a crash before help has arrived, have your passenger call emergency services, or if alone pull over to the side of the road when it is safe to do so and make the call.
  • If you have no reception, continue driving until you do and keep any landmarks near the site of the accident in mind to inform emergency services of the location – remember they will want to know which way you are travelling and which side of the road the crash is on.
  • Remember, even if no member of the public is available to report a crash or incident, our radar system will have detected the incident and a response team will be on the way.
  • If you are involved in a minor accident and are stopped on the motorway, move your car to the side of the road. When it is safe to do so, move as far out of the way from the traffic as possible and put your hazard lights on to warn surrounding traffic while you wait for assistance.