Commercial Driving After a DUI in Ontario
Zero tolerance applies whenever you are behind a commercial wheel, the fines are twenty times higher, and an interlock condition reaches the work vehicle too.
If your licence was invalid for three years or more, you have a road test ahead of you and possibly years since you last drove. The device is only half the problem.

Drivers whose licence was invalid long enough to trigger the road-test requirement — three years or more — and who have not been behind a wheel for most of that time. The interlock is new, but so is everything else.
Some people book refresher hours instead of the full ten-hour course, because they are already comfortable with the device and only want the driving back. Others book them alongside it.
After three years off the road, in our experience, in this order:
Bought in hours rather than as a fixed package, because the amount needed varies enormously. We will tell you honestly partway through whether you need more time before booking a test — and if you are ready sooner than you thought, we will say that too.
Lessons run in a vehicle with an interlock fitted, so the device practice happens naturally alongside the driving rather than as a separate exercise.
Refresher hours and the road-test car book together, and the lessons are scheduled backwards from your DriveTest appointment.
| Your situation | What we would suggest |
|---|---|
| Device is new, and you have not driven in years | The ten-hour course. It covers both. |
| Comfortable with the device, rusty behind the wheel | Refresher hours only. |
| Driving regularly, device is new | The ten-hour course, or fewer hours focused on the device. |
| Driving regularly and used to the device | Just the car and the warm-up hour on test day. |
Before you book anything, check how long your licence was invalid. It is the only thing that decides whether a road test is required, and we would rather tell you now.
Refresher lessons pair naturally with the ten-hour ignition interlock training course and with interlock car rental for your road test. Whether you need a test at all is covered in getting your licence back after a DUI in Ontario, and our ignition interlock program reviews are worth reading first. See also about our Ottawa interlock driving school and the ignition interlock training FAQ.
Zero tolerance applies whenever you are behind a commercial wheel, the fines are twenty times higher, and an interlock condition reaches the work vehicle too.
There is no work exemption from an Ontario suspension. What people actually do for the months in between, and the conversation worth having early.
How long since you last drove, and whether a test date is already set. We will suggest a number of hours and quote it, and we will not oversell you the full course if you do not need it.
Phone is faster. Someone answers Monday to Saturday, evenings included.