We want to know your thoughts on proposed new speed limits of 110km/h for Transmission Gully and Raumati Straights.
Opening in 2022, Transmission Gully provides important regional resilience and a safe, modern, reliable route to and from Wellington.
These sections of motorway currently have a speed limit of 100km/h and we’re keen to hear what you think about our proposal to increase this speed limit to 110km/h.
Consultation runs from Friday 30 May until Thursday 10 July 2025.
|
Location |
Description of location |
Road length |
Current speed limit |
Proposed new speed limit |
|
SH1 Te Aranui o Te Rangihaeta – Transmission Gully |
SH1 Transmission Gully Motorway from Paekakariki Interchange to Linden Interchange, including the northbound and southbound ramps at the SH58 Paremata / Haywards Road Interchange. |
27km |
100km/h |
110km/h |
|
SH1 Raumati Straights |
SH1 Kapiti Expressway along Raumati Straights from current 110 speed threshold to Mackays Interchange, including the northbound off-ramp and southbound on-ramp at Poplar Ave / Raumati South Interchange. |
4.6km |
100km/h |
110km/h |
Transmission Gully
Raumati Straights
View a larger version of the maps [PDF, 557 KB]
When considering a speed limit change on our state highways, NZTA considers a range of factors including efficiency, safety, and the views of the community and road users. We’re committed to delivering safe roads that help people get where they need to go efficiently and safely.
Transmission Gully was designed and constructed to a high safety standard. This has been reflected in low crash numbers since opening in 2022. We’re currently in the process of completing remaining surfacing works.
We’re also consulting on Raumati Straights, which connects Transmission Gully with Kāpiti Expressway. Safety improvements will be needed on the 4.6 km Raumati Straights section of the Kāpiti Expressway to help support any potential increase in the speed limit. We’re currently considering safety improvements including side barrier works, lighting upgrades, and other infrastructure improvements. These works would be dependent on scoping, design, and funding.
By consulting on this section now, we can finalise a decision on appropriate speed limits quicker, ahead of possible safety improvements on the section.
Police apply the same enforcement to 110km/h roads as any other part of the road network. Drivers can expect to see police patrols on New Zealand roads anywhere, at any time.
In addition, the current 90km/h speed limit for heavy vehicles and towing vehicles still applies on roads with a 110km/h speed limit. The roads proposed to change to 110km/h have at least two lanes in each direction, so other road users should be able to safely and easily pass slower-moving vehicles.
As part of this speed review, we consider the implementation costs and overall safety and travel time impacts of the proposed speed limit changes in a Cost Benefit Disclosure Statement (CBDS).
Cost Benefit Disclosure Statement - Raumati Straights speed limit review [PDF, 183 KB]
If the speed limit changes from 100 km/h to 110 km/h, implementation costs would be around $7.1 million. Longer term widening of the whole section could cost up to $45.1 million.
Implementation costs may also include such things as planning, road signs and markings, lighting, side barrier improvements, pull over bays, installation costs, overheads, and consultation and administration costs.
If the speed limit increases from 100 km/h to 110 km/h over this section, the expected travel time reduction for light vehicles is 3.2 seconds. The top speed limit for heavy vehicles remains at 90km/h so there would be no change for these vehicles.
It is estimated that there would be an 8% increase in injury crashes if the speed limit changed from 100km/h to 110km/h.
Cost Benefit Disclosure Statement - Transmission Gully speed limit review [PDF, 179 KB]
If the speed limit changes from 100 km/h to 110 km/h, implementation would cost approximately $250,000.
Implementation costs may also include such things as planning, road signs and markings, installation costs, overheads, and consultation and administration costs.
If the speed limit increases from 100 km/h to 110 km/h over this section, the expected travel time reduction for light vehicles is 18 seconds, with no change for heavy vehicles.
It is estimated that there would be an 7% increase in injury crashes if the speed limit changed from 100km/h to 110km/h.
Have your say on the speed limit change proposal in your region(external link)
information you have provided in this form will be made publicly available (with the exception of any personal information that could be used to identify an individual such as names, contact details and physical address) and will be used by NZ Transport Agency Waka Kotahi (we/us) to gain feedback, write our consultation report, and to meet the consultation requirements for the proposal to change speed limits on Transmission Gully and Raumati Straights as set out in the Land Transport Rule: Setting of Speed Limits 2024. Any personal information you provide might legally need to be disclosed to third parties if subject to a request under the Official Information Act 1982 (or as otherwise required by law). If your feedback is commercially sensitive or you do not want it disclosed, please let us know. Under the Privacy Act 2020 you have the right to know what personal information we hold about you. You can read more about how we handle your information on our website, or contact us at info@nzta.govt.nz
