When Snow Hides the Lines: Collision on the Coquihalla

This case involves a passenger car and a tractor-trailer that collided on a snow-covered stretch of the Coquihalla Highway (BC Highway 5). While the truck driver claimed he was safely established in his lane, the court found that he had suddenly pulled out to pass a slower vehicle, cutting off a passing car driver, The car driver lost control and struck the rear of the trailer, resulting in catastrophic, life-altering injuries.

Who is at fault for unsafe lane changes in BC?

The core of the judgment rested on Section 151 MVA, which governs how drivers must behave on laned roadways.

• The Violation: The judge found that Mr. Dhillon moved into the fast lane to pass another truck without ensuring he could do so safely.
• The Rule: A driver must not move from one lane to another unless they have "ascertained that movement can be made with safety and will in no way affect the travel of another vehicle."
• The Impact: By cutting off Mr. Uy’s car suddenly and without warning, Mr. Dhillon "encroached" on the car's path, leaving Mr. Uy no choice but to take emergency evasive action.

BC MVA Signal Requirements for Commercial Trucks

Proper communication is vital, especially for massive commercial vehicles on a mountain pass.

• The Violation: Evidence suggested that Mr. Dhillon did not provide sufficient warning before moving his tractor-trailer into the left lane.
• The Rule: The MVA requires drivers to signal their intention to change lanes using an "approved mechanical device" (turn signals).
• The Standard: Mr. Dhillon himself testified that safe trucking practice requires 8 to 10 seconds of signalling before moving—a standard the court found he failed to meet in this instance.

Careless Driving & Improper Passing

The court also looked at the general duty to drive with "due care and attention."

• The Violation: Mr. Dhillon attempted a pass during winter conditions on the Coquihalla when it was not safe to do so given the approaching traffic (Mr. Uy's car).
• The Rule: Section 144 MVA prohibits driving without reasonable consideration for others on the highway.
• The Outcome: The court ruled that Mr. Dhillon’s decision to pass a slower truck at that specific moment was the sole cause of the loss of control that followed.

Driving on Snow-Covered Roads: Are Lane Rules Still Enforceable?

One of the most interesting parts of this judgment was the discussion of Section 151 when road lines are covered by snow. The court ruled that even if the physical lines on the road are obscured by snow or ice, the rules of laned travel still apply.

Drivers are expected to stay in their "imaginary" lanes and are strictly prohibited from moving out of their path of travel if it will affect another vehicle.

What is the 'Agony of the Moment' doctrine in BC law?

The defense tried to use Section 162 MVA (following too closely) to blame Mr. Uy. However, the judge applied the "Agony of the Moment" doctrine.

This rule says that if a driver is forced into a sudden emergency by someone else's negligence, they aren't held to a standard of "perfect" driving. Mr. Uy's decision to steer right to avoid the truck was considered a reasonable response to the hazard Mr. Dhillon created.

Learn More

• Read the reasons for judgment - Uy v Dhillon

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