
When daylight saving time ends each November, Oregon drivers gain an hour of sleep — but often lose more in alertness and safety. The sudden shift in daylight and disrupted sleep schedules can trigger a sharp rise in fatigue-related car accidents throughout Portland, Gresham, Clackamas, Troutdale, and Happy Valley.
For over three decades, Peterson Law Offices has represented injured Oregonians and Washington residents in personal injury cases stemming from preventable accidents. Understanding how fatigue affects driving — and what legal options exist when a tired driver causes harm — is critical as we head into darker, wetter months.

The Science Behind Driver Fatigue
Fatigue impacts the body much like alcohol. According to the National Safety Council, being awake for 20 hours straight impairs reaction time and decision-making as much as a 0.08% blood alcohol concentration. When the clocks shift and the body’s internal rhythm is disrupted, even a modest loss of sleep can reduce focus and alertness.
In Portland, where cloudy skies and early sunsets dominate late fall, fatigue can hit drivers harder. Commuters often leave work in near-darkness, triggering drowsiness at the wheel — especially on long stretches like I-205, Highway 26, or Powell Boulevard.
When fatigue combines with the glare of rain-soaked streets, the risk of collisions increases dramatically.

Why Fatigue Peaks Right After the Time Change
The end of daylight saving time means darker mornings and evenings. For many Oregonians, this transition leads to temporary insomnia or disrupted sleep cycles. Studies show accident rates rise significantly during the week following the fall time change due to:
- Reduced daylight exposure, which affects mood and alertness
- Sleep deprivation or irregular sleep schedules
- Increased commuter traffic in the dark
- Glare from wet pavement and headlights
Fatigue isn’t limited to long-distance drivers — even local Portland commuters experience reduced attentiveness and slower reaction times during the transition.

Proving Negligence in Fatigue-Related Accidents
Under Oregon law, all drivers have a duty to operate vehicles safely. Driving while fatigued may be considered negligence if it contributes to an accident. However, proving fatigue can be challenging, as there’s no simple test like a breathalyzer.
An experienced Oregon personal injury lawyer can gather evidence such as:
- Cell phone and work records showing excessive hours or lack of rest
- Eyewitness statements describing drowsy behavior
- Vehicle data showing late braking or swerving
- Police reports referencing fatigue as a factor
By demonstrating that a driver failed to exercise reasonable care, your attorney can build a strong claim for compensation.

Common Injuries in Fatigue-Related Collisions
Fatigued driving often leads to rear-end, head-on, and side-impact crashes — accidents that cause serious injuries. Victims frequently experience:
- Concussions and traumatic brain injuries
- Back and neck injuries
- Broken bones
- Internal bleeding or organ damage
Many victims are passengers or drivers struck by someone who simply “nodded off” at the wheel. These accidents are entirely preventable — and victims deserve full compensation for their losses.

What to Do After a Fatigue-Related Crash
If you suspect fatigue played a role in your accident, take these steps immediately:
- Call 911 to report the crash and request medical help.
- Document the scene, including road conditions and the other driver’s behavior.
- Collect witness information to support your version of events.
- Seek medical treatment right away — fatigue-related crashes often cause hidden injuries.
- Contact an injury attorney before speaking with insurers.
At Peterson Law Offices, we help clients navigate complex personal injury claims with compassion and precision. Our firm has been serving the Portland metro area since 1991 and is known for handling cases involving fatigued driver accidents with meticulous attention to detail.

How an Experienced Lawyer Can Help
Working with a seasoned attorney means having someone who understands the nuances of Oregon’s comparative negligence laws. Even if the fatigued driver denies fault, we know how to investigate sleep patterns, employment records, and accident reconstruction reports to establish liability.
We also help clients recover damages for:
- Medical bills and future care
- Lost income
- Pain and suffering
- Vehicle repair or replacement
You can read how we’ve helped past clients in our testimonials, or reach out directly via our contact page.

Stay Safe During Oregon’s Darker Months
Fatigue is often underestimated, but its effects are as dangerous as impaired driving. If you’ve been injured in a crash caused by a drowsy or distracted driver in Portland, Gresham, Clackamas, Troutdale, or Happy Valley, contact Peterson Law Offices for experienced legal representation.
Our firm’s deep understanding of Oregon’s roads and weather conditions helps clients pursue fair compensation — and peace of mind.

