Emergency services were called at 1.12pm on Friday 15 May to a serious crash on State Highway 1 near the intersection of North Rakaia Road in Bankside, Selwyn District, just north of the Rakaia River Bridge. The incident involved at least three vehicles and prompted an immediate large-scale response from police, fire, and ambulance services.

Despite the efforts of emergency personnel, two people were pronounced dead at the scene. Three others sustained injuries ranging from moderate to critical. Hato Hone St John transported two patients to Christchurch Hospital by helicopter — one in a critical condition, one seriously injured — while a third was transported by road ambulance in a moderate condition.

NZTA closed SH1 north of the Rakaia Bridge — New Zealand's longest road bridge — for approximately five hours while police's Serious Crash Unit examined the scene. Traffic backed up significantly on the main highway, prompting many motorists to divert via State Highway 77, which in turn experienced lengthy delays near the Rakaia Gorge bridge.

The South China Morning Post later reported that the two people killed were Hong Kong tourists. The Chinese Consulate General in Christchurch 'expressed deep sorrow over the deaths' and confirmed it was providing assistance to the injured and their families.

NZTA confirmed the highway reopened at approximately 6.55pm after the crash scene had been cleared and all vehicles towed. Motorists were asked to travel with care as congestion eased.

The crash came on the same day as the fatal Mairehau house fire, making 15 May one of the most tragic days Canterbury emergency services had faced in recent months. Police renewed calls for drivers to exercise patience and caution on rural highways, particularly in the days leading into the Queen's Birthday long weekend.

"Main South Road will be blocked for a significant period of time. Motorists are advised to avoid the area and choose alternative routes." — NZ Police spokesperson, 15 May 2026