More than 7,600 impaired driving incidents were recorded in Alberta last year—a sobering reminder of how common roadside stops are during the holidays.
If you’re pulled over, it’s crucial to know your rights.
This guide explains what roadside officers can and can’t do, plus what you’re legally required to comply with in Alberta.
By the end, you’ll know how to navigate a holiday checkstop with clarity and confidence.
What Are Police Allowed to Ask at a Holiday Checkstop?
Police authority at roadside stops comes from the Criminal Code of Canada and Alberta’s Traffic Safety Act. These laws give police broad powers to check drivers for impairment and verify that they’re operating their vehicles legally.
Here’s what officers are allowed to ask or require in Alberta:
- Request your driver’s licence, registration, and insurance.
- Ask basic questions about your driving and recent drug or alcohol use.
- Demand a Mandatory Alcohol Screening (MAS) breath test (even if you show no signs of impairment).
- Conduct a field sobriety test by the roadside or by relocating you to a secondary screening area.
- Issue immediate penalties under Alberta’s IRS program.
Mandatory Alcohol Screening: What You Must Comply With
When an officer makes a lawful MAS demand, you must:
- Provide a breath sample immediately: Police may treat delays, arguing, or attempting to negotiate the test as a refusal.
- Follow instructions for how the sample is taken: The device must register a proper sample for the demand to be satisfied.
- Remain at the roadside until testing is complete: Leaving before the test is finished counts as a failure or refusal.
What Happens If You Refuse a Mandatory Screening Test?
If you refuse a breath test, Canadian law treats you the same as if you blew over the legal limit.
A refusal can lead to:
- Criminal charges for “failure or refusal to comply”
- Severe driver’s licence consequences
- A permanent criminal record if convicted
Importantly, refusal consequences are triggered even if you were not impaired.
Read more: How Long Does A DUI Stay On Your Record?
What Police Cannot Do During a Holiday Stop
While police have broad authority during holiday checkstops, there are clear limits on what they can require.
Officers must follow the Criminal Code and the Charter of Rights and Freedoms, which protect drivers from unreasonable search and seizure.
Here’s what police cannot do, unless they have lawful grounds:
- They cannot search your vehicle without reasonable grounds or consent: A checkstop alone does not justify a vehicle search. Officers must have a clear legal basis, such as evidence of impairment, open alcohol, or another suspected offence.
- They cannot require drug recognition testing without reasonable suspicion: Unlike alcohol screening, drug impairment evaluations (DRE or SFST) require visible signs of impairment before they can be demanded.
- They cannot arrest you for refusing casual questions: You must provide documentation and comply with screening demands, but you are not required to answer open-ended questions about where you’ve been, where you’re going, or how much you’ve had to drink.
- They cannot extend the stop without a valid reason: Once required checks are complete, police must let you go unless something gives them lawful grounds to investigate further.
- They cannot force you to incriminate yourself: Anything you say can be used as evidence, but you are not obligated to provide additional information beyond what the law requires.
These limits help balance police authority with your legal protections.
Common Mistakes Drivers Make at Holiday Checkstops
It goes without saying: getting behind the wheel while impaired is a costly mistake to make.
However, even sober drivers can unintentionally make errors at a holiday checkstop that escalate the situation or limit their legal options later.
Should you find yourself at a holiday checkstop, avoiding these mistakes can protect your rights and reduce legal exposure:
- Giving more information than required: Police might misinterpret extra details and prompt further testing.
- Refusing a lawful MAS test: Drivers sometimes refuse when they feel the request is unfair; but refusal almost always leads to more sever consequences.
- Showing frustration, fear, or anger: Officers document demeanour. They may justify a prolonged interaction or further assessments based on your confrontational behaviour.
- Trying to end the stop early: You’re not free to go until the officer clearly releases you.
- Failing to document the stop: If something felt off (e.g., the timing, testing process, or comments from an officer), writing down the details for your record can help a lawyer assess whether the stop was handled properly.
Even with a smooth interaction, certain factors can shift a roadside stop into something more serious.
When a Roadside Stop Can Lead to a Charge
Most holiday checkstops end quickly, but a stop can become a criminal investigation if officers detect signs that raise concern.
Indicators of impairment (e.g., difficulty standing, slowed responses, or the odour of alcohol or drugs) can lead to further testing. A failed or refused breath test also triggers immediate consequences under federal law.
In other situations, what the officer sees inside the vehicle or learns during the stop may warrant further action. Open liquor, prohibited items, or outstanding warrants can shift the encounter from screening to enforcement.
And when a stop follows unsafe driving behavior, the interaction typically becomes more serious from the outset.
Once a stop escalates, the process moves fast. Getting advice from a DUI lawyer early helps you understand your options before decisions are made that affect your licence and record. To learn how these cases play out, read our article, A Holiday DUI: What You Need to Know.
When You Should Call a Lawyer
The moment a roadside stop becomes more than a simple check, it’s essential to seek legal advice immediately.
Many drivers don’t know what to do next, or whether the officer’s request was even lawful — but the law expects you to act quickly.
A lawyer helps you regain control by reviewing the stop, identifying procedural issues, and protecting your rights before further action is taken.
If you have questions about what happened, or you’re already facing the consequences of a failed or refused test, don’t wait to get advice.
Connect with McGlashan Law now and get support from a defence lawyer who understands how these cases unfold.
