SH20 Maioro St On-Ramp Crash: Delays & Updates

Multi-Vehicle Crash Causes Major Delays on Auckland’s SH20

A multi-vehicle collision on a busy Auckland on-ramp is causing notable traffic disruptions this morning, December 18, 2025. The incident,involving four vehicles,has resulted in injuries and major alterations to traffic flow on State Highway 20.

Incident details and Road closures

The crash occurred just after 5:00 AM on the Maioro St on-ramp in Wesley, Auckland. Authorities have closed the southbound on-ramp entirely, and the off-ramp has been reduced to a left-turn only configuration to manage the flow of traffic. According to initial reports, the incident was reported to police shortly before 5:00 AM. Initial investigations suggest the crash may have been caused by a vehicle losing control on the wet road surface, leading to a chain reaction involving the other three vehicles. The vehicles involved include a van, a sedan, and two SUVs.

Did you know? The Maioro St on-ramp is a key access point to SH20, notably for commuters traveling from the western suburbs of Auckland. Closures here significantly impact travel times across the city.

Injuries and Emergency Response

Three people sustained injuries in the collision and have been transported to Auckland City Hospital for medical attention. While the extent of thier injuries was initially unknown, a hospital spokesperson has now confirmed that one person is in serious but stable condition, while the other two sustained moderate injuries. emergency services, including police, fire and ambulance personnel, were quickly on the scene to provide assistance and secure the area. The Serious Crash Unit attended to investigate the cause of the incident.

Pro tip If you are travelling towards SH20 this morning, check the Auckland Transport website or app for real-time traffic updates and alternative route suggestions. Consider using public transport if possible.

Authorities worked diligently throughout the morning to clear the wreckage and reopen the on-ramp. The scene was fully cleared at approximately 10:30 AM, and the southbound on-ramp was reopened to traffic. The off-ramp returned to normal operation shortly after. Police have completed their investigation and have not yet determined if any charges will be laid. The investigation is ongoing, and anyone with facts about the crash is encouraged to contact the Auckland City Police.

motorists are advised to expect residual delays as traffic volumes normalize.

Further updates will be provided if they become available.