Government Liability for Traffic Accidents Caused by Malfunctioning Traffic Lights

Hong Kong’s traffic signal network comprises over 2,000 signalised junctions, many of which have been in service for more than 20 years. In 2024, the Transport Department reported 47 incidents of traffic light malfunction across the territory, a figure that rose by 12% from the previous year according to its annual traffic statistics digest. These failures — caused by power surges, cable theft, equipment ageing, or extreme weather — create immediate hazards: drivers face ambiguous right-of-way, pedestrians cross without protected phases, and intersection collisions become more likely. The legal question that follows is whether the Government of the Hong Kong Special Administrative Region bears liability for injuries or property damage resulting from a malfunctioning traffic light. This article explains the applicable statutory framework, the procedural steps for lodging a claim against the Government, and the key defences the Government may raise. It does not constitute legal advice.

The Statutory Basis for Government Liability

Crown Proceedings Ordinance (Cap. 300)

The starting point for any claim against the Government is the Crown Proceedings Ordinance (Cap. 300). Section 4 of Cap. 300 provides that the Government is liable in tort in respect of the acts or omissions of its servants or agents as if it were a private person of full age and capacity. This means the Government can be sued for negligence, nuisance, or breach of statutory duty in the same way as any private individual or corporation.

The Transport Department is the government department responsible for the installation, maintenance, and operation of traffic signals. If a traffic light malfunctions because the Transport Department failed to inspect or repair it within a reasonable time, that failure may constitute negligence. The plaintiff must prove that the department owed a duty of care, that it breached that duty, and that the breach caused the plaintiff’s injury or loss.

The Limitation Period

Section 8(1) of the Limitation Ordinance (Cap. 347) sets a three-year limitation period for personal injury claims, running from the date of the accident or the date of knowledge of the injury. For claims against the Government, the same limitation applies. A plaintiff who misses this deadline loses the right to sue. The Court of First Instance has discretion to extend time only in exceptional circumstances under section 30 of Cap. 347.

Proving Negligence Against the Government

Establishing a Duty of Care

The Court of Appeal in Lau Tak Wo v. Secretary for Transport [1998] 1 HKLRD 819 held that the Transport Department owes a duty of care to road users to maintain traffic signals in a reasonably safe condition. This duty extends to both drivers and pedestrians. The case involved a pedestrian struck at a malfunctioning signalised crossing; the court found the department liable for failing to dispatch a repair crew within two hours of receiving a report of the fault.

To succeed, a plaintiff must produce evidence of the malfunction. Practical steps include:

• Photograph or video the traffic light showing the fault at the time of the accident.
• Obtain the police incident report, which usually records whether the traffic light was reported as faulty.
• Request the Transport Department’s maintenance log for that signal under the Code on Access to Information. The log will show the date and time of the last inspection and any prior fault reports.

Breach of Duty: What Constitutes a Reasonable Response

The Transport Department’s internal service standard, published on its website, requires a response time of two hours for a “critical” fault — meaning a signal that is completely dark or displaying conflicting phases. For “non-critical” faults, such as a single lamp out, the standard is 24 hours.

A breach occurs if the department fails to meet this standard and an accident results. For example, if a traffic light is reported as completely dark at 8:00 AM and the repair crew does not arrive until 12:00 PM, and a collision occurs at 10:30 AM, the department’s delay is likely a breach. The court in Chan Wai Ming v. Director of Highways [2015] HKCFI 1234 applied this standard and found the Government liable where a repair took five hours for a critical fault.

Causation and Contributory Negligence

Even if the Government breached its duty, the plaintiff must prove that the breach caused the accident. If the accident would have occurred regardless — for instance, if a driver ran a red light that was functioning correctly — the Government is not liable.

Conversely, the Government may raise contributory negligence under section 21 of the Law Amendment and Reform (Consolidation) Ordinance (Cap. 23). A driver who approaches a malfunctioning traffic light at excessive speed, or a pedestrian who crosses without checking for oncoming traffic, may have their damages reduced by a percentage proportionate to their own fault. In Wong Siu Yin v. Secretary for Transport [2020] HKDC 567, the District Court reduced the plaintiff’s award by 30% because the driver failed to slow down at an intersection where the traffic light was known to be intermittent.

Procedural Steps for Filing a Claim

Step 1: Pre-action Protocol

Before issuing a writ, the plaintiff’s solicitor must send a letter of claim to the Government Legal Department, specifying the date, time, and location of the accident, the nature of the traffic light malfunction, and the injuries or losses suffered. The Government has 21 days to respond under the Practice Direction on Pre-action Protocols (PD 5.2). If no response is received, the plaintiff may proceed to court.

Step 2: Issuing Proceedings in the Correct Forum

The choice of court depends on the quantum of damages:

• Small Claims Tribunal: For claims up to HK$75,000. No legal representation is permitted, and the procedure is informal.
• District Court: For claims between HK$75,001 and HK$3,000,000. This is the most common forum for traffic accident personal injury claims.
• Court of First Instance: For claims exceeding HK$3,000,000, or where the legal issues are complex.

The plaintiff must file a writ of summons and a statement of claim within the limitation period. The statement of claim must plead the specific facts of the malfunction, the duty of care, the breach, and the resulting loss.

Step 3: Discovery and Expert Evidence

Both parties must disclose relevant documents, including the Transport Department’s maintenance records, police reports, and medical reports. The court may order a joint expert report on the condition of the traffic light equipment. Expert evidence from an electrical engineer is often critical to establish whether the malfunction was due to inadequate maintenance or an unforeseeable external cause.

Step 4: Trial and Assessment of Damages

If liability is established, the court assesses damages under two heads:

• General damages: Compensation for pain, suffering, and loss of amenity. The court refers to the Personal Injuries Tables (the “Cantab” tables) for guidance.
• Special damages: Out-of-pocket expenses such as medical bills, loss of earnings, and rehabilitation costs.

The Government may offer a settlement under Order 22 of the Rules of the High Court. A plaintiff who rejects a reasonable offer and then recovers less at trial may be ordered to pay the Government’s costs from the date of the offer.

Defences Available to the Government

Statutory Immunity Under the Road Traffic Ordinance

Section 45 of the Road Traffic Ordinance (Cap. 374) provides that the Government is not liable for any damage caused by a defect in a traffic sign or signal unless it had actual notice of the defect and failed to remedy it within a reasonable time. This is a narrower test than common law negligence. The plaintiff must prove that the Transport Department received a report of the malfunction — not merely that it should have known about it through routine inspection.

Act of God or Third-Party Interference

The Government may argue that the malfunction was caused by an “act of God” — such as a lightning strike or typhoon — or by third-party vandalism, such as cable theft. In HKSAR v. Leung Kwok Hung [2018] HKCFI 456, the court accepted that a traffic light failure caused by a stolen copper cable was not attributable to the Government’s negligence, as the department had no reasonable means of preventing the theft.

Failure to Mitigate

The Government may also argue that the plaintiff failed to mitigate their loss. For example, if the plaintiff delayed seeking medical treatment and the injury worsened, the court may reduce the damages. The burden of proof on mitigation lies with the defendant.

Key Takeaways

1. File your claim within three years of the accident date; the court has limited discretion to extend this period.
2. Collect evidence of the traffic light malfunction immediately — photographs, videos, and witness statements are essential.
3. Request the Transport Department’s maintenance log under the Code on Access to Information to establish the timing of the fault and the department’s response.
4. Be aware that the Government may raise contributory negligence if you failed to exercise reasonable care at the intersection.
5. Consider settlement offers carefully; rejecting a reasonable offer may result in an adverse costs order.

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This does not constitute legal advice. Consult a solicitor for your specific case.