{"id":555094,"date":"2026-08-01T19:15:34","date_gmt":"2026-08-01T19:15:34","guid":{"rendered":"https:\/\/www.newsbeep.com\/nz\/555094\/"},"modified":"2026-08-01T19:15:34","modified_gmt":"2026-08-01T19:15:34","slug":"3-65b-northland-expressway-promises-minutes-saved-but-could-deliver-thin-returns","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/nz\/555094\/","title":{"rendered":"$3.65b Northland expressway promises minutes saved but could deliver thin returns"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Analysis:\u00a0When Rodney Farm\u2019N\u2019Machinery was razed in a suspected arson last month, it took the fire engines a while to arrive. The business is in the village of Te Hana \u2013 Auckland\u2019s northernmost outpost on State Highway 1.<\/p>\n<p class=\"wp-block-paragraph\">Manager\u00a0Devend\u00a0Chandra is a bit of a jack of all trades: he\u2019s a mechanic, he provides a towing service, and he rents out machinery such as a\u00a0tractor, roller, digger and truck. He\u00a0says he lost $20,000 worth of tools in the blaze, which weren\u2019t insured. \u201cI\u2019m really feeling the pain.\u201d<\/p>\n<p class=\"wp-block-paragraph\">For him, yesterday\u2019s news that the\u00a0Government has signed a public-private partnership to deliver the first section of the Northland Expressway \u2013 Warkworth to Te Hana \u2013 is too little too late.<\/p>\n<p class=\"wp-block-paragraph\">Cars and trucks speed along the road outside the front door of his business; it was a worry when his four kids were small, but they\u2019re all grown up now.\u00a0<\/p>\n<p class=\"wp-block-paragraph\">At $3.65 billion, the expressway will be the most expensive road ever built in NZ. Local leaders say it\u2019s the biggest investment in Northland since the high-voltage power cables were put through in the 1960s, but Chandra isn\u2019t convinced the expressway\u2019s planned opening \u2013 seven years away in 2033 \u2013 will shift the dial.<\/p>\n<p class=\"wp-block-paragraph\">Some cars may turn off to Te Hana to get a bite to eat and use the toilets at Te Hana Caf\u00e9; most will probably continue on through to Kaiwaka and beyond.<\/p>\n<p class=\"wp-block-paragraph\">Northland leaders, however, are far more upbeat. Kaipara Mayor Jonathan Larsen and Whang\u0101rei Mayor Ken Couper tell me they\u2019ve been planning for this for years.<\/p>\n<p class=\"wp-block-paragraph\">\u201cA four-lane motorway coming right to the doorstep of the Kaipara District is absolutely huge for us,\u201d says Larsen. \u201cThat\u2019s the biggest thing I\u2019ve seen happen from an infrastructure perspective in my lifetime.\u201d<\/p>\n<p class=\"wp-block-paragraph\">\/\/ Larsen drives through Kaiwaka on his way to work, and likes to stop at the Italian bakery there to pick up one of their famous long cream donuts, and a coffee.<\/p>\n<p class=\"wp-block-paragraph\">\u201cKaiwaka is going to be the first stop out of Auckland, and so I\u2019m really focused on making sure that Kaiwaka is going to be prepared for the growth that\u2019s going to come. There\u2019s going to be more traffic, and there\u2019s going to be more people visiting, and so we need to make sure we\u2019ve got the right infrastructure in place and the right facilities for travellers. Toilets, parking, all those key things to make sure that people do want to stop and shop and enjoy the place.\u201d<\/p>\n<p class=\"wp-block-paragraph\">It will trim seven to 10 minutes off the drive north. The mayors accept it will almost certainly be a toll road, meaning local motorists will contribute a \u201csignificant\u201d portion of the cost of building it. Larsen hopes the toll will be less than $5. \u201cI don\u2019t think people will mind too much, to get a much superior road.\u201d<\/p>\n<p><img loading=\"lazy\" data-recalc-dims=\"1\" decoding=\"async\" width=\"780\" height=\"574\" src=\"https:\/\/www.newsbeep.com\/nz\/wp-content\/uploads\/2026\/08\/scene-of-arson-in-rodney.jpg\" alt=\"\" class=\"wp-image-485009\"  \/>After the fire at Rodney Farm\u2019N\u2019Machinery.<\/p>\n<p class=\"wp-block-paragraph\">Transport Minister Chris Bishop has signed an agreement with a group called the Northway Consortium to design, build, finance, maintain and operate the expressway through to 2058. It\u2019s a new 26km four-lane expressway, with interchanges at Warkworth, Wellsford and Te Hana.<\/p>\n<p class=\"wp-block-paragraph\">(The Wellsford interchange will be at Wayby Rd, which will be convenient for all the Waste Management trucks transporting Auckland\u2019s refuse to the massive new landfill the company hopes to build there).<\/p>\n<p class=\"wp-block-paragraph\">The expressway will feature 15 bridges, two underpasses, 12 wetland stormwater treatment basins, and 1km twin tunnels through Kraack Hill above the Dome Valley.<\/p>\n<p class=\"wp-block-paragraph\">Public-private partnerships have been controversial, and some, like Transmission Gully, have ended up overdue, over budget and over in court as the builder, managers, financiers and the Crown sue each other.<\/p>\n<p class=\"wp-block-paragraph\">But Bishop says this time, they\u2019ve incorporated lessons from previous PPPs, including Transmission Gully, along with international best practice and market feedback. \u201cThis has included a more sophisticated approach to allocating risk, securing property and resource consents earlier, and establishing a stronger evidence base for setting affordability thresholds.\u201d<\/p>\n<p class=\"wp-block-paragraph\">He says the final project cost has a net present value of $3.65b. That\u2019s $251m below the $3.9b public sector comparator approved by Cabinet last year, which estimates what the project would cost under traditional public sector procurement. \u201cThis PPP represents good value for taxpayers,\u201d he says.<\/p>\n<p class=\"wp-block-paragraph\">\/\/ So is this road good value for money? Bishop says yes. Every dollar invested is expected to return $1.60 in wider economic benefits to NZ.<\/p>\n<p class=\"wp-block-paragraph\">To be fair, that\u2019s better than the worst of the Roads of National Significance (the proposed motorway improvements through central Wellington have a benefit-cost ratio of 1.2) but it\u2019s still not good. Not good at all. The Cambridge-to-Piarere expressway is expected to have about a 3-to-1 benefit-cost ratio.<\/p>\n<p class=\"wp-block-paragraph\">Over the life of the Warkworth-to-Te Hana expressway, these benefits are expected to include 145 fewer deaths and serious injuries, 1000 fewer closure hours caused by unexpected events like severe weather, and removing 1000 heavy vehicles a day from the main streets through Wellsford and Te Hana.<\/p>\n<p class=\"wp-block-paragraph\">The investment case adds up the current total value of a future stream of benefits, adjusted for inflation and risk. The first 20 years are discounted at 2 percent; the subsequent 40 years at 1.5 percent \u2013 placing greater weight on the long-term costs and benefits.<\/p>\n<p class=\"wp-block-paragraph\">The NZ Transport Agency published the investment case yesterday. It shows almost all the projected benefits are from the seven to 10 minutes saved on travel time. The savings from fewer accidents are valued at just one tenth of the total benefits, and savings to vehicle operating costs and resilience benefits are negligible. The expressway will slightly worsen emissions.<\/p>\n<p class=\"wp-block-paragraph\">The benefit-cost ratio would actually have been just 1.4, except that the agency has also factored in so-called wider economic benefits to push the number up to 1.6.<\/p>\n<p class=\"wp-block-paragraph\">\u201cNorthland is one of the poorer-performing regions economically in NZ,\u201d the report says. \u201cGiven its location next to NZ\u2019s best-performing regional economic centre of Auckland, the economic benefits are considerable and could have not only regional significance, but also national benefits.\u201d<\/p>\n<p class=\"wp-block-paragraph\">The investment case admits it\u2019s difficult to quantify these potential benefits, but suggests these could include improved land use, increased competition and increased labour supply.<\/p>\n<p class=\"wp-block-paragraph\">The thing is, all these benefits have been calculated at new Treasury-mandated lower discounts. It\u2019s more defensible to use the lower discount rates when you\u2019re talking about the 1km tunnels, which would be expected to last a very long time, than it is to apply them to other aspects of the project.<\/p>\n<p class=\"wp-block-paragraph\">\u201cI am darkly amused that the people who pushed very hard for this kind of discount rate, thinking they\u2019d get better climate policy, are getting more roads. I hope they are very happy with their success,\u201d says NZ Initiative economist Eric Crampton. \u201cAt any normal discount rate (4 percent or 8 percent) the project costs more than it is worth even when wider economic benefits are taken into account.\u201d<\/p>\n<p class=\"wp-block-paragraph\">\/\/ As a dairy farmer who relies on getting the contractors in, and the milk trucks out, mayor Ken Couper is hopeful the gradual extension of the expressway will help the economy.<\/p>\n<p class=\"wp-block-paragraph\">There\u2019s now the hope, in Northland, that the railway may reopen and extend out to Northport, while the expressway eventually extends through to Whang\u0101rei \u2013 though there\u2019s still no budget or timeframe for that.<\/p>\n<p class=\"wp-block-paragraph\">Couper agrees with Chandra that it\u2019s taking a long time; he admits it may not happen in his lifetime. \u201cBut these things take time. I think the important thing is that it\u2019s going to be started. Chris Bishop has said that Northland has a load of potential there waiting to be tapped, and so that\u2019s really good.<\/p>\n<p class=\"wp-block-paragraph\">At the moment, he says, Northland is a net taker: \u201cWe contribute less than we get in grants and benefits and things like that. The cost of the way Northland is operating at the moment is not sustainable, and so part of this is saying, you have a responsibility to lift yourself up.\u201d<\/p>\n<p class=\"wp-block-paragraph\">Northland leaders understand that. \u201cWe are ready to respond to that and make sure that we are trying very hard in areas like education, areas like our council reform, looking for ways to make things better so that we actually can contribute. And I think that\u2019s the signal the Government trying to to send, and the response they\u2019re looking for.\u201d<\/p>\n<p class=\"has-primary-variation-color has-light-gray-background-color has-text-color has-background has-link-color has-normal-font-size wp-elements-490835e47580e7997d708e6f22d2c9be wp-block-paragraph\">This analysis was first published in the Newsroom Pro subscriber newsletter. If you\u2019re interested in seeing more content like this, you can subscribe <a href=\"https:\/\/newsroom.co.nz\/newsroom-pro-subscription\/\" data-type=\"link\" data-id=\"https:\/\/newsroom.co.nz\/newsroom-pro-subscription\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">here.<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"Analysis:\u00a0When Rodney Farm\u2019N\u2019Machinery was razed in a suspected arson last month, it took the fire engines a while&hellip;\n","protected":false},"author":2,"featured_media":555095,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[111,43,139,69],"class_list":["post-555094","post","type-post","status-publish","format-standard","has-post-thumbnail","category-new-zealand","tag-new-zealand","tag-news","tag-newzealand","tag-nz"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts\/555094","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/comments?post=555094"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts\/555094\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/media\/555095"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/media?parent=555094"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/categories?post=555094"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/tags?post=555094"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}