Marijuana, Impaired Driving & a Father's Fight for Justice | Ed WoodMarijuana, Impaired Driving & a Father's Fight for Justice | Ed Wood
The Addiction Podcast - Point of No Return
Ed Wood shares how his son’s death in a crash involving marijuana, methamphetamine and heroin led to 16 years of research into drug-impaired driving. He discusses legal and scientific problems with THC limits, the dangers of polydrug driving, and his efforts to influence policy and public understanding.
24:54•5 Nov 2026
Marijuana, Drugged Driving and a Father’s Relentless Fight for Safety
Episode Overview
- Drug-impaired driving laws often rely on vague or inconsistent definitions of impairment, making prosecutions difficult.
- Alcohol is the only drug with a validated blood level tied to crash risk; THC levels in blood cannot reliably show driving impairment.
- Polydrug driving, involving two or more substances, appears significantly more dangerous than alcohol alone based on Colorado data.
- Per se THC limits, such as five nanograms, can wrongly convict unimpaired drivers and exonerate impaired ones, due to lack of correlation with impairment.
- Focusing on behavioural evidence of unsafe driving, rather than toxicology numbers alone, may lead to more accurate and fair convictions.
“Impairment is impairment.”
How do people find strength in their journey to sobriety? This episode brings that question into sharp focus through Ed Wood’s heartbreaking yet determined story. Sixteen years ago, Ed’s 33-year-old son Brian was killed when a vehicle, driven by people under the influence of marijuana, methamphetamine and heroin, crashed into his car. Brian died instantly; his pregnant wife survived but was left with lasting neurological injury. That moment turned a grieving father into a relentless researcher on drug-impaired driving.
Across the conversation, you’ll hear Ed calmly unpack some very uncomfortable truths about how drugged driving is handled in the United States. He explains that, in many states, “it is not unlawful…to drive while you’re on those drugs” unless specific per se laws exist, and even then marijuana is exceptionally hard to police. His core message is simple and blunt: “Impairment is impairment,” whether it’s called mild or subtle.
You’ll learn why blood tests for THC can’t reliably show who’s actually unsafe behind the wheel, and how Colorado’s data suggest their five-nanogram limit for marijuana is “more harmful than it is helpful.” The episode also digs into polydrug driving, which Ed describes as even more dangerous than high-level alcohol impairment, and challenges popular myths like “I drive better when I’m stoned.” His long-term mission has taken him from courtrooms to peer-reviewed journals and all the way to testimony before a DEA administrative law judge on marijuana’s proposed move to Schedule III.
Ed walks through the difference between impairment-based laws and per se limits, why alcohol is the only drug with a validated blood level tied to crash risk, and how THC behaves completely differently in the body because it’s oil-soluble. If you’re interested in how policy, science and personal loss collide around drug use and road safety, this conversation may leave you asking: how many lives could be saved if we truly understood and acted on what impairment means?
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