Dooring Accidents in Ontario: When a Car Door Hits a Cyclist
- 2 days ago
- 8 min read
A dooring accident happens when someone opens a vehicle door into the path of a cyclist. These crashes often happen with almost no warning. A cyclist may have only a moment to brake, steer away, or avoid being pushed into traffic.
In an Ontario bicycle accident claim, the issue is not complicated in theory. The person opening the door is expected to check first. The harder questions are factual:
when was the door opened?
where was the cyclist positioned?
how much time did the cyclist have to react?
was there room to move away safely?
did the door force the cyclist into an emergency situation?
Under Ontario’s Highway Traffic Act, a person must not open the door of a motor vehicle on a highway without first taking due precautions to make sure doing so will not interfere with or endanger another person or vehicle.
Dooring claims often turn on timing, lane position, reaction time, and whether the cyclist had any realistic chance to avoid the door once it opened.
These issues arise frequently in serious Ontario bicycle accident claims, especially where cyclists are injured on streets with curbside parking, bike lanes beside parked vehicles, delivery activity, taxis, rideshares, or narrow traffic lanes.
What Is a Dooring Accident?
A dooring accident occurs when a driver or passenger opens a vehicle door and it collides with a cyclists
It seems to commonly occur when:
a driver opens the door after parking
a passenger exits into a bike lane or curb lane
a rideshare or taxi passenger opens a door without checking
a delivery vehicle stops beside a cycling route
a door is left open long enough to block the cyclist’s path
Some cases involve direct impact with the door. Others involve an avoidance crash. A cyclist may swerve to avoid the door, lose control, hit the curb, or move into traffic.
Why Dooring Accidents Leave Cyclists With So Little Time
Dooring accidents are dangerous because they unfold so quickly
A cyclist riding beside parked vehicles may need to:
recognize the door is opening
decide whether braking or steering is safer
check whether traffic is beside them
avoid the door
avoid losing control
That happens very quickly. This is why blame is sometimes misplaced in dooring cases. It is easy after the fact to say the cyclist should have stopped or gone around the door. In the moment, the cyclist may have had no safe option. Braking hard can cause a fall. Steering left can move the cyclist into a live traffic lane. Continuing straight can mean hitting the door.
The Door Zone and Cyclist Lane Position
The “door zone” is the area beside parked vehicles where an opening door can enter a cyclist’s path.
This is seen on roads where:
parked cars line the curb
bike lanes run beside parking spaces
traffic forces cyclists close to parked vehicles
construction narrows the available lane
vehicles stop for pickup, delivery, or passenger unloading
Cyclists might try to ride outside the door zone. But in real road conditions, that's easier said than done.
A cyclist’s position is affected by:
lane width
passing traffic
parked vehicle placement
bike lane design
curb conditions
road debris
construction barriers
the speed of surrounding traffic
In disputed claims, drivers or insurers may argue that the cyclist was riding too close to parked cars. That argument can oversimplify the road conditions. The cyclist may have been riding where the lane, traffic, and surrounding hazards left them little choice.
Driver and Passenger Responsibility Before Opening a Door
The person opening the door has to check before opening it. That responsibility applies to:
drivers
front-seat passengers
rear-seat passengers
taxi passengers
rideshare passengers
delivery vehicle occupants
A check may be inadequate if:
it was done too early
the person only glanced forward
the mirror was not checked
there was no shoulder check
the door was opened suddenly
the person failed to consider cyclists using the curb lane or bike lane
A cyclist can close distance quickly. Someone may check, pause, gather belongings, talk to another passenger, and then open the door after the situation has changed.
The important question is whether the person checked immediately before opening the door.
Why Swerving Is Not Always a Safe Option
After a dooring crash, there is often a suggestion that the cyclist should have gone around the door. However, A cyclist who swerves left may be moving into:
an active traffic lane
the path of an overtaking vehicle
streetcar tracks
uneven pavement
another cyclist’s path
construction narrowing
a lane with faster traffic
A cyclist who brakes hard may lose control, especially if the road is wet, uneven, or covered with debris. A cyclist continuing straight may strike the door.
These cases often involve a split-second choice between bad options. The fact that the cyclist did not avoid the crash does not mean the cyclist caused it.
Direct Impact Cases and Avoidance Crashes
There are two types of dooring cases.
Direct impact cases involve the cyclist striking the door. These cases may involve:
shoulder impact
wrist or hand injury
facial injury
dental injury
head impact
a fall onto the roadway
Avoidance cases involve the cyclist crashing while trying to avoid the door. These cases may involve:
loss of control
collision with another vehicle
collision with the curb
impact with the roadway
secondary impact after evasive movement
Avoidance cases are more likely to be seriously disputed. The insurance company might argue that the door did not cause the crash because the cyclist did not hit it. That misses the point. If the door created the emergency that caused the cyclist to swerve or lose control, the door opening may still be central to liability.
Common Injuries in Dooring Accidents
Dooring accidents can cause significant injuries because cyclists have little protection.
Common injuries include:
facial injuries
dental injuries
wrist and hand fractures
shoulder injuries
clavicle fractures
rib injuries
knee injuries
road rash
soft tissue injuries
The injuries can be worse when the cyclist is thrown into traffic or lands hard on the roadway.
A dooring crash can feel minor from the vehicle occupant’s perspective. For the cyclist, it can mean a direct fall, a head impact, or a secondary collision.
How Liability Is Assessed in a Dooring Accident
The liability analysis usually starts:
who opened the door?
was the vehicle parked or stopped?
was the door opened into a bike lane, curb lane, or cyclist’s path?
did the person opening the door check first?
how long was the door open before the crash?
was the cyclist visible before the door opened?
did the cyclist have time to brake or steer away?
was there traffic preventing the cyclist from moving left?
did road design place the cyclist close to parked vehicles?
Many roads effectively force cyclists into areas near parked cars. The issue is whether the door was opened safely and whether the cyclist had a realistic opportunity to avoid the hazard.
Evidence Used in Dooring Accident Claims
Dooring cases often depend on evidence such as:
cyclist statement
driver or passenger statement
witness evidence
photographs of the parked vehicle
location of the door
bike lane or curb lane layout
damage to the bicycle
damage to the door
nearby camera footage
dashcam footage
police report details
medical records describing the injury mechanism
The timing of events is be especially important.
Did the door open suddenly?
Was it already open?
How close was the cyclist when it opened?
Was there room to move left?
Was traffic beside the cyclist?
Did the cyclist brake, swerve, or strike the door directly?
Those facts affect liability and can answer the common allegation that the cyclist should have avoided the collision.
Passenger Dooring, Rideshares, and Taxis
Dooring accidents are not limited to drivers exiting parked cars. Passengers also open doors into the path of cyclists. This can happen with:
taxis
rideshare vehicles
delivery vehicles
private vehicles stopped at the curb
vehicles unloading passengers near bike lanes
Passenger dooring can creates extra factual issues.
where did the vehicle stop?
was it stopped in or beside a bike lane?
did the passenger check before opening the door?
did the driver warn the passenger to check?
was the driver aware that cyclists were passing beside the vehicle?
These cases are common in dense traffic areas because cyclists may be travelling between parked or stopped vehicles and moving traffic. A passenger may not think like a driver. They may open the door as if they are stepping onto a sidewalk, even when the door opens into a cyclist’s path.
Dooring Accidents and Bike Lanes
Bike lanes do not eliminate dooring risk. Some bike lanes run directly beside parked vehicles. In those locations, the road design itself places cyclists near the door zone.
A cyclist may have been riding exactly where the road directed them to ride, yet still be exposed to an opening door.
In bike lane dooring cases, the analysis focuses on:
the layout of the bike lane
the position of the parked vehicle
the distance between the cyclist and the parked cars
whether the door opened into the bike lane
whether the cyclist had a safe alternative path
whether traffic prevented the cyclist from riding farther left
These issues arise frequently in Mississauga bicycle accident claims, where curbside parking, bike lanes, taxis, delivery vehicles, and rideshare stops often interact in tight urban corridors.
Dooring Accidents Outside Toronto
Dooring is often associated with downtown Toronto, but it is not only a Toronto problem. Dooring risk can arise anywhere cyclists travel beside parked or stopped vehicles, including:
downtown cores
commercial streets
school zones
restaurant districts
retail plazas
transit corridors
residential streets with curbside parking
These issues can arise in Vaughan bicycle accident claims, where cyclists may encounter parked vehicles, commuter traffic, and busy mixed-use streets near cycling routes and urban corridors.
Dooring is also more likely to occur in Brampton bicycle accident claims, particularly where there are commercial plazas, curbside pickup, delivery activity, and roads where cycling infrastructure interacts with parked or stopped vehicles.
How Do
oring Accidents Fit Into Ontario Bicycle Accident Claims
Dooring claims bring together several issues:
statutory road safety duties
timing
reaction time
cyclist lane position
road design
injury mechanics
evidence from the scene
They may seem straightforward, but sometimes can become disputed when an insurer argues that the cyclist was too close, riding too fast, or should have avoided the door.
. In many cases, the cyclist’s position and reaction only make sense when the road layout, traffic conditions, and timing of the door opening are examined together.
You can learn more about these cases through our Ontario Bicycle Accident Lawyers page.
Fordiscussion of driver perception and vulnerable road users, see our article on what happens when a driver says they did not see a motorcycle or cyclist.
Frequently Asked Questions About Dooring Accidents in Ontario
Who is at fault in a dooring accident in Ontario?
The person who opened the door is the focus of the claim. The issue is whether they checked properly and opened the door only when it was safe to do so.
What should a driver do before opening a car door near cyclists?
A driver should check mirrors, shoulder check, and make sure opening the door will not interfere with or endanger a cyclist or another road user.
Can a passenger be responsible for dooring a cyclist?
Yes. A passenger who opens a door into a cyclist’s path is likely responsible for causing the crash. The driver’s conduct may also be reviewed depending on where the vehicle stopped and what was happening at the time.
Is the cyclist at fault if they were riding close to parked cars?
Not automatically. Cyclist lane position depends on road design, traffic, bike lane layout, parked vehicles, and available space. Being near parked vehicles does not mean the cyclist was at fault.
What if the cyclist swerved and did not hit the door?
A cyclist still hasa claim if the opened door created the emergency that caused the crash. The issue is whether the door opening forced the cyclist into an unsafe evasive movement.
Can a dooring accident cause serious injuries?
Yes. Cyclists can suffer concussions, fractures, shoulder injuries, wrist injuries, facial injuries, dental injuries, and other significant injuries from a dooring crash or the fall that follows.
Final Observations
Dooring accidents happen fast. They are caused by a door being opened at the exact moment a cyclist has no safe response available.
In Ontario bicycle accident claims, the details can matter. A dooring crash should not be reduced to “the cyclist hit a door.” In many cases, the opened door created an emergency the cyclist had almost no time to escape.