What You Should Know About Drinking and Driving in Ontario

by | Mar 20, 2026

*Disclaimer: This article is for educational purposes only. Not to be used as legal advice. 

Introduction: What Rising Spring Traffic Means for You This Year

Spring brings warmer weather, longer days, and more time spent out with friends and family. It also brings an increase in roadside stops and impaired driving investigations across Ontario.

At The Law Office of Amy Osman, we meet many clients each year who never imagined they would face an impaired driving charge. Most are honest, hardworking people who made a split-second decision (or misunderstood their rights at the roadside) and ended up in a serious legal situation.
Our goal with this article is to help you stay informed and avoid common, preventable mistakes. Understanding drinking and driving in Ontario, knowing your obligations at roadside stops, and being aware of how the Supreme Court of Canada’s R. v. McColman decision affects police powers can make a significant difference in your safety and legal protection.

This article will help you understand the consequences of drinking and driving in Ontario: learn the laws, your rights, and what to do to avoid impaired driving charges this spring. Throughout this article, we will also explain when it may be time to contact a criminal defence lawyer in Windsor, and why early legal guidance is crucial if you are being investigated or charged.

Why Impaired Driving Charges Increase in the Spring

Ontario police services see an increased spike in impaired driving charges every year in the springtime. It is important to understand these predictable reasons so that you can take precautions:

  • More patio gatherings and outdoor events where alcohol is served
  • Long weekends and holidays such as Victoria Day and St. Patrick’s Day
  • Late-night driving in unfamiliar areas
  • Graduation and prom season
  • Misjudging personal limits
  • Pressure to “just drive home”
  • More vehicles returning to the roads after winter

According to MADD Canada, an average of 9 federal criminal charges and provincial short-term licence suspensions are laid for alcohol or drug-impaired driving every hour. This averages to approximately 215 impaired-driving sanctions per day, with noticeable increases during peak social seasons.
Source: https://madd.ca/pages/impaired-driving/overview/statistics/
This is one of the reasons our team sees a sharp rise in calls asking to speak with a lawyer in Windsor about a drinking and driving investigation. Many people do not realize how strict Ontario’s impaired driving laws have become, or how small errors at a roadside stop can lead to criminal charges.

Understanding Ontario’s Impaired Driving Laws

Ontario’s impaired driving laws fall under both the Criminal Code of Canada and provincial legislation. It is crucial to clearly understand how the law applies to you.

Criminal “Over 80” BAC Charges

A person commits a criminal offence if their blood alcohol concentration (BAC) is 80 mg or more per 100 mL of blood.
Even if you feel fine, your BAC can exceed this threshold depending on weight, metabolism, the speed of drinking, and the type of alcohol consumed.
Disclaimer: This information is for educational purposes only. Not to be used as legal advice.

Impairment Without a Specific BAC Number

Police can also lay a charge of “impaired operation” without a BAC reading. Officers can rely on:

  • slurred speech
  • difficulty standing
  • bloodshot eyes
  • poor coordination
  • odour of alcohol
  • erratic driving

This surprises many clients who consult us as a criminal defence lawyer in Windsor, as they believe only a breath test matters. In reality, visible signs alone can be enough to warrant criminal charges related to drinking and driving in Ontario.

Failing or Refusing a Demand

You may not be aware that refusal to provide a breath sample at the police station or roadside is a criminal offence. Penalties are comparable to (and sometimes more severe than) impaired driving.

We often explain to clients that refusing a test does not avoid consequences. It simply creates a different type of criminal charge, with automatic licence suspensions and heavy fines.

R. v. McColman: What This Case Means for Ontario Drivers

In 2023, the Supreme Court of Canada released its decision in R. v. McColman, changing how police powers apply when it comes to impaired driving stops.

What This Means for You

Police:

  • can investigate on public roads,
  • cannot conduct an arbitrary detention on private property,
  • may investigate on private property only if they have reasonable grounds.

This case has become one of the most important developments we consider when people contact our office asking for a lawyer in Windsor after a traffic stop involving drinking and driving in Ontario.

Roadside Testing: Your Rights and Obligations

Misunderstanding roadside testing rules is one of the most common reasons people face charges.

  1. You MUST comply with a lawful breath demand; if an officer demands a roadside breath sample, the law requires you to comply.
    Refusing is a criminal offence that carries:
    • a mandatory fine
    • a criminal record
    • a licence suspension
    • possible jail time for repeat offences
  2. Police do NOT need reasonable suspicion to demand a roadside test.
    Since 2018, police can require a breath sample from any driver they lawfully stop, without needing signs of impairment.
  3. You do NOT have the right to contact a lawyer before roadside testing
    The Charter right to counsel applies after detention or arrest, not before a roadside demand.
    As a criminal defence lawyer in Windsor, we often meet people who thought refusing was the correct way to preserve their rights. Unfortunately, refusal creates an additional criminal charge and rarely improves the legal outcome.
  4. After arrest, your rights expand
    Once arrested, you have the right to:
    • speak with a lawyer as soon as reasonably possible
    • speak privately
    • contact an interpreter
    • understand the exact charges and demands being made
    • This is the crucial time to contact an experienced local criminal defence lawyer.

Common Spring Scenarios That Lead to Charges

Scenario 1: “I only had two drinks.”
Two drinks can result in a BAC over 80 mg depending on factors like body weight, timing, and food intake.
Prevention tip: Don’t rely on how you feel. Plan transportation ahead of time.

Scenario 2: “Sleeping it off” in your car
Even if parked, you can be charged with “care or control.”
Prevention tip: Arrange a ride in advance; do not rest inside your vehicle.

Scenario 3: Being the “semi-designated” driver
Some believe one drink is harmless. Police don’t see it that way.
Prevention tip: If you’re the designated driver, be fully sober.

Penalties for Drinking and Driving in Ontario

Drinking and driving in Ontario convictions result in:

  • a criminal record
  • mandatory fines
  • licence suspension
  • increased insurance premiums
  • ignition interlock requirements
  • a long-term impact on employment
  • potential jail time

The consequences are significant and often long-lasting. This is why connecting with a criminal defence lawyer in Windsor as soon as possible is critical.

To learn more about how our office supports clients facing criminal charges, visit:🔗 https://osmanlaw.ca/criminal-law/

Conclusion: Staying Safe and Informed This Spring

Spring is meant to be a time of renewal and celebration. A charge related to drinking and driving in Ontario can quickly change that.
If you find yourself being investigated or charged, please remember this:
If you’ve been charged, don’t panic; we’ll guide you every step of the way.
Reach out to The Law Office of Amy Osman for supportive, non-judgmental legal guidance from a criminal defence lawyer in Windsor who understands both the legal system and the stress you’re under.
“We don’t judge – we defend.”

Contact Us Today

Don’t procrastinate reaching out for help. The earlier you involve a lawyer in Windsor, the more options you may have.
Call or WhatsApp: +1-519-253-4662
Visit: www.osmanlaw.ca
Serving Windsor and all of Ontario

*Disclaimer: This article is for educational purposes only. Not to be used as legal advice.