Driving After Concussion: When Is It Safe?

Driving requires more brain power than you think

Driving seems automatic when you're healthy — but it actually places heavy demands on multiple brain systems simultaneously. You need to:

• Process fast-moving visual information in your peripheral and central vision
• Make rapid decisions based on changing road conditions
• Coordinate eye movements, head movements, and spatial awareness
• Maintain sustained attention over extended periods
• React quickly to unexpected events

After a concussion, any or all of these capacities may be impaired — even if you feel mostly fine sitting at home. The demands of driving can reveal deficits that aren't apparent during low-demand activities.

When you should not drive

There is no universally mandated driving restriction after concussion in Ontario, but clinical guidelines recommend avoiding driving when:

• You are still in the first 24–48 hours after injury
• You are experiencing significant dizziness or vertigo
• Your reaction time feels slow
• You have difficulty with visual scanning or tracking
• You're taking medications that affect alertness (certain pain medications, sleep aids)
• You feel cognitive brain fog that impairs concentration
• Head turns trigger symptoms (this matters for checking mirrors and blind spots)
• You feel unsafe or lack confidence behind the wheel

If any of these apply, don't drive. The risk isn't just to you — it's to everyone else on the road.

How to test your readiness

Before returning to driving, consider these informal checks:

• Can you turn your head fully left and right without triggering dizziness or neck pain?
• Can you track a moving object smoothly with your eyes without discomfort?
• Can you sustain concentration for at least 20–30 minutes without significant symptom increase?
• Are your reaction times normal? Try catching a dropped ruler or responding to a timer — do you feel sharp?
• Can you tolerate visual motion? Try sitting as a passenger first and see how you handle the visual complexity of traffic

If you're unsure, start as a passenger on familiar routes. Then try short, low-traffic drives before progressing to longer or more complex routes.

What a concussion assessment adds

A concussion assessment evaluates several functions directly relevant to driving safety:

• Vestibular function — are head turns causing dizziness?
• Oculomotor control — can your eyes track and scan efficiently?
• Cervical spine — is neck mobility sufficient for mirror and shoulder checks?
• Reaction time and cognitive processing — are you quick enough for traffic demands?

If any of these systems are impaired, targeted treatment can improve them. Many patients find their driving confidence returns as these specific deficits are addressed.

Gradual return to driving

Like return to sport, return to driving should be gradual:

1. Passenger rides — tolerate visual complexity and motion as a passenger
2. Short, familiar routes — quiet roads you know well, during low-traffic times
3. Moderate routes — longer drives or busier roads, still during good conditions
4. Highway and complex driving — higher speeds, lane changes, unfamiliar routes
5. Night driving — often the last to return, as it places extra visual-processing demands

Progress through each stage only when the previous one feels comfortable and symptom-free.

Don't rush it

There's no prize for driving again sooner than you should. A few extra days or weeks of getting rides from others is a small price for safety. If symptoms are limiting your ability to drive and not improving, a physiotherapy assessment can help identify what's holding you back and create a plan to get you safely back on the road.