Who’s to Blame in a Left‑turn Car Crash?

Left-turn collisions are among the most common and most disputed car accidents in Ontario. These crashes often happen at intersections, involve serious injuries, and raise difficult questions about faults and liability. If you were involved in a left-turn accident, understanding how fault is determined can help you protect your legal and insurance rights.

While many drivers assume fault is automatically assigned to the person turning left, Ontario law takes a more detailed and fact-based approach. This article explains how fault is assessed, when responsibility can be shared, and why speaking with an experienced auto accident lawyer is often critical.

What Is the Legal Duty of a Left-turning Driver in Ontario?

Under Ontario’s Highway Traffic Act, a driver making a left turn must ensure the road is clear and yield the right of way to oncoming traffic. This means waiting until it is safe to complete the turn without interfering with vehicles travelling straight through the intersection.

Because of this obligation, left-turning drivers are often presumed to be at fault when a collision occurs. Insurance companies and courts typically begin with the assumption that the turning driver failed to yield properly. However, that assumption can be challenged when other factors are involved.

When the Other Driver May Be at Fault

A left-turning driver is not always fully responsible for an accident. The fault may be shared, or in some cases shifted, when the oncoming driver acted negligently.

Common examples include:

• speeding through the intersection

• running a red light

• accelerating aggressively through a yellow light

• driving while distracted or impaired

Ontario applies a contributory negligence system, which means more than one driver can be found partially at fault. Even if you were making a left turn, you may still have a valid claim for compensation depending on the circumstances.

Yellow Lights and Advance Green Signals

Left-turn accidents frequently occur when one driver is turning on a yellow light while another is proceeding straight through the intersection. Ontario law allows drivers facing a yellow light to proceed if stopping were unsafe, but the definition of unsafe is often disputed.

Advance green signals add another layer of complexity. A driver making a left turn on an advance green generally has the right of way, but that right is not absolute. Drivers must still ensure the intersection is clear and watch for vehicles that may enter late or unlawfully.

Ontario Case Law Spotlight: How Mayers V. Khan Defines Left‑turn Responsibility

Ontario courts have repeatedly reinforced the heavy responsibility placed on left-turning drivers. In the Ontario Court of Appeal decision Mayers v. Khan (2017 ONCA 524), the court emphasized that a driver turning left must not enter the path of oncoming traffic unless it is safe to do so.

In this case, the court upheld the principle that even where there are disputes about speed or traffic signals, the left-turning driver bears a high burden of care. The decision highlights why left-turn accident claims are highly fact-specific and why legal guidance is so important when the fault is contested.

Why Fault Matters After a Left-Turn Accident

Fault affects far more than who receives a traffic ticket. It can directly impact:

• insurance coverage and premium increases

• your ability to sue for damages

• the amount of compensation you may recover

Insurance adjusters often try to resolve fault quickly and in their own favour. Without proper legal advice, drivers may unknowingly accept an unfair fault assessment.

How an Auto Accident Lawyer Can Help

Left-turn accidents require careful analysis of evidence such as witness statements, traffic camera footage, vehicle damage, and police reports. An experienced auto accident lawyer can identify details that insurers often overlook and help ensure fault is assessed accurately.

If you have been injured, speaking with a lawyer can also help protect your right to compensation for medical expenses, lost income, and long-term care needs. For drivers in Durham Region and beyond, working with knowledgeable auto accident lawyers can make a significant difference in the outcome of your claim.

Final Thoughts

Determining fault in a left-turn car accident is rarely straightforward. While left-turning drivers carry a higher legal responsibility under Ontario law, each case depends on the facts. If you are unsure where you stand, professional legal guidance can clarify your options and protect your interests.

If you have been involved in a left-turn collision, consulting a qualified auto accident lawyer at Kelly Greenway Bruce in Oshawa early is one of the most effective steps you can take.