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How SIRA Determines Liability in Aquaplaning Accidents in NSW

This article explains how the State Insurance Regulatory Authority (SIRA) assesses liability in aquaplaning accidents in New South Wales, focusing on reasonable driver conduct in wet weather. It outlines the evidence needed, entitlements under the CTP scheme, and time limits for claims, with practical guidance for injured road users in areas like Bankstown.

Current as at 7 October 2026

Understanding Aquaplaning Accidents in NSW CTP Claims

Aquaplaning occurs when a vehicle's tyres lose contact with the road surface due to a layer of water, leading to loss of steering, braking and acceleration control. In New South Wales, liability for such accidents is assessed under the Motor Accident Injuries Act 2017 and the Motor Accident Injuries Regulation 2017, administered by the State Insurance Regulatory Authority (SIRA). SIRA does not automatically assign fault based on weather conditions. Instead, it examines whether the driver’s actions were reasonable given the circumstances, including road conditions, speed, vehicle maintenance and adherence to traffic laws. This applies equally in areas like Bankstown, where wet weather and road surface conditions may increase the risk of aquaplaning. The focus is on whether the driver exercised reasonable care, not on whether the weather contributed to the incident.

How SIRA Assesses Fault in Wet Weather Accidents

SIRA determines liability by assessing whether the driver’s conduct fell below the standard of a reasonable person under similar conditions. Factors considered include whether the driver was driving at a speed appropriate for wet roads, whether the vehicle’s tyres were in good condition and properly inflated, and whether the driver maintained a safe distance from other vehicles. If a driver was speeding, failed to adjust for weather, or had worn tyres, SIRA may find them at fault. However, if the driver was driving at a reasonable speed, maintained a safe distance, and had a vehicle in good condition, SIRA may find no fault, particularly if another driver’s actions caused the collision. SIRA’s assessment is not based on weather alone but on whether the driver’s actions were reasonable in the context of the conditions.

Evidence That Supports a CTP Claim After Aquaplaning

To support a claim, you must provide evidence that helps establish the circumstances of the accident. This includes:

  • Medical records detailing injuries sustained, including any neurological symptoms that may suggest spinal nerve-root injury
  • Photographs of the vehicle, road surface, and surrounding area taken at or near the time of the accident
  • A police report, if one was filed, including details of weather conditions and road surface
  • Witness statements, if available, describing the vehicle’s movement before and during the incident
  • Vehicle maintenance records, particularly tyre tread depth and service history
  • A statement from a qualified medical practitioner confirming the nature and cause of injuries

SIRA may also review traffic camera footage, if available, and use expert evidence to assess whether aquaplaning occurred and whether the driver’s actions contributed to the accident. The absence of a police report does not prevent a claim, but it may affect the strength of the evidence.

What You Can Claim Under NSW CTP Rules

If liability is established, you may be entitled to statutory benefits under the CTP scheme. These include:

  • Treatment and care benefits for medical treatment and rehabilitation
  • Weekly income payments if you are unable to work due to injury
  • A lump sum for permanent impairment, if assessed as a whole person impairment

If your injuries exceed the threshold for damages (such as a permanent impairment of 10% or more, or a threshold injury), you may also be eligible to claim damages for pain and suffering, loss of enjoyment of life, and future care needs. However, if your only injuries are threshold injuries (such as soft tissue injuries), the weekly benefits and treatment and care benefits are generally limited to 52 weeks after the accident, as provided under the Motor Accident Injuries Act 2017, section 4.4.

Time Limits and Procedural Requirements

A claim for motor accident compensation must be made within 3 years of the accident date, as required under the Motor Accident Injuries Act 2017. However, if you are claiming for damages, there may be additional procedural steps, including the need to obtain a medical assessment for whole person impairment and to notify the insurer within 6 months of the accident. Failure to meet these time limits may result in the claim being barred. It is important to act promptly to preserve your rights.

When to Seek Independent Advice

If you believe the insurer’s assessment of fault is incorrect, or if you have sustained a serious injury that may qualify for damages, it is advisable to seek independent legal advice. SIRA does not determine the outcome of a claim in every case, insurers assess claims and may dispute liability or the value of benefits. If a dispute arises, you may request a review through SIRA’s dispute resolution process, or you may choose to pursue a common law damages claim. However, a damages claim is only available if your injuries meet the threshold for damages under the Motor Accident Injuries Act 2017.

Hypothetical Example: Aquaplaning on a Rainy Day in Bankstown

A driver was travelling on the M4 Motorway in Bankstown during heavy rain. The vehicle began to aquaplane and collided with a stationary vehicle ahead. The driver had recently replaced tyres, which were within legal tread depth, and was driving at the posted speed limit for wet conditions. A witness reported that the vehicle had not been speeding and that the road was heavily sprayed by traffic. The driver sustained a soft tissue injury to the neck and back. SIRA would assess whether the driver’s actions were reasonable under the conditions. Given the vehicle was maintained properly and speed was appropriate, SIRA may find no fault, particularly if the stationary vehicle had not been clearly visible due to spray. The driver would still be entitled to treatment and care benefits and weekly income payments, but would not be able to claim damages unless a threshold injury was confirmed by a medical assessment.

Next Steps for Injured Road Users

Every claim depends on its own facts. To request contact about your circumstances, complete the quick, no obligation enquiry form.

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