G Driving Test Highway Tips Canada — Ontario 2026 Guide
The G road test is the final step to a full Ontario licence — and the highway portion is what makes it different from the G2. Here's everything you need to know to handle it with confidence, from merging at speed to what to do if you miss your exit.
Last updated: August 2026 — reflects current Ontario DriveTest standards.
In This Article
- 1.What makes the G test different
- 2.G test vs G2 test — key differences
- 3.Entering the highway (on-ramp)
- 4.Lane discipline
- 5.Speed control
- 6.Exiting the highway
- 7.What to do if you miss your exit
- 8.What examiners watch for
- 9.Common mistakes
- 10.FAQ
What Makes the G Test Different
The G test includes everything from the G2 test — plus highway driving. You'll drive on a 400-series highway (or high-speed expressway) at 100 km/h with the examiner beside you. The total test is approximately 30–45 minutes, compared to the G2's 20–30 minutes. The highway portion itself typically lasts 10–15 minutes.
Most DriveTest centres use nearby 400-series highways. Centres in Barrie use Highway 400, Oshawa and Whitby use Highway 401, and centres in the Hamilton area use the QEW or Highway 403. The specific route varies by centre — call ahead to confirm which highway you'll be tested on.
Most people who fail the G test do so because of the highway portion — specifically merging, lane discipline, and speed management. The good news: these are all learnable skills with the right preparation.
Eligibility: You must have held your G2 for at least 12 months before booking the G test. You have up to 5 years from your G1 issue date to complete the G test.
G Test vs G2 Test — Key Differences
Understanding how the G test differs from the G2 helps you focus your preparation on what's new. Here's a side-by-side comparison:
| Feature | G2 Test | G Test |
|---|---|---|
| Highway driving | ✗ Not required | ✓ Required (10–15 min) |
| Test duration | 20–30 minutes | 30–45 minutes |
| Speed requirement | Up to 80 km/h (city) | 100 km/h (highway) |
| Parallel parking | ✓ Tested | ✓ Tested |
| Three-point turn | ✓ Tested | May be tested |
| Lane changes | City streets only | City + highway |
| Merging onto highway | ✗ Not required | ✓ Required |
For a full breakdown, see our G test full licence guide.
Entering the Highway (On-Ramp)
Merging onto the highway is the most critical skill on the G test. Here's how to do it correctly:
- 1Use the full length of the acceleration lane to reach highway speed (100–110 km/h). Don't merge at 70 km/h — you must match the speed of traffic.
- 2Signal before merging. Check your rear-view mirror, side mirror, and do a full shoulder check to confirm the lane is clear.
- 3Merge smoothly into the right lane when there's a safe gap in traffic. Aim for a gap of at least 4 seconds.
- 4Never stop at the end of the ramp — it's dangerous and an automatic fail on the G test.
For a detailed walkthrough of the merge technique, read our guide to merging onto Ontario highways.
Lane Discipline
Ontario's Highway Traffic Act requires you to drive in the right lane unless passing. Here's what that means in practice:
- Stay in the right lane unless you're actively passing another vehicle.
- Once you've passed, move back to the right lane promptly — don't linger in the left (passing) lane.
- Maintain a consistent speed. Don't accelerate and brake repeatedly.
- Keep at least 3 seconds of following distance at 100 km/h.
- Signal every lane change — even on the highway. Check mirrors and do a shoulder check each time.
Speed Control on the Highway
Most Ontario highways have a speed limit of 100 km/h. You're expected to drive at or near this speed — not 80 km/h in the right lane. Driving too slowly impedes traffic flow and is a fault on the G test.
A range of 90–105 km/h is generally acceptable to examiners. Driving consistently at 95 km/h is fine. Driving at 80 km/h or below is a fault. Driving above 110 km/h is also a fault.
The 3-second following distance rule
At 100 km/h, you need at least 3 seconds of following distance. Here's how to check: pick a fixed landmark ahead (a sign, overpass, or road marking). When the car in front passes it, count "one-thousand-one, one-thousand-two, one-thousand-three." If you reach the landmark before finishing the count, you're too close — ease off the accelerator.
Can I use cruise control?
Yes, cruise control is allowed on the G test. It can help you maintain a consistent speed on the highway. However, you must still check your mirrors regularly and be ready to disengage cruise control quickly if traffic conditions change. Don't rely on it as a substitute for active driving awareness.
Exiting the Highway (Off-Ramp)
- 1Signal at least 100 metres before the exit. Don't leave it to the last second.
- 2Move to the right lane early — well before the exit ramp begins.
- 3Reduce your speed on the off-ramp, not on the highway itself. Braking on the highway is a fault.
- 4Follow the posted speed limit for the ramp (usually 60–80 km/h).
What If You Miss Your Exit?
Missing your highway exit during the G test is more common than you think — and it does not automatically fail you. What matters is how you handle it.
Remember: The examiner has driven this route hundreds of times. They know what to do if you miss the exit. Stay calm, keep driving safely, and follow their instructions.
Common Mistakes on the G Test
- Stopping at the end of the on-ramp instead of merging at speed — automatic fail.
- Not checking blind spots before lane changes on the highway.
- Driving too slowly (below 90 km/h) in the right lane.
- Staying in the left lane when not passing.
- Braking on the highway instead of waiting for the off-ramp.
- Forgetting to signal lane changes and exits.
- Panicking and making sudden movements when missing an exit.
Conclusion: Confidence on the Highway Starts with Preparation
The highway portion of the G test is the most challenging part — but it's also the most predictable. The examiner is looking for the same things every time: a confident merge at speed, consistent lane discipline, proper following distance, and a smooth exit.
Practice these skills on actual 400-series highways before your test. Drive the route near your DriveTest centre if possible. The more familiar the road feels, the calmer you'll be when it counts.
For more preparation resources, read our full G test guide, the G test highway guide, and our tips on how to merge onto Ontario highways.
Frequently Asked Questions
Which highway will I drive on during the G test?
It depends on your DriveTest centre. Most centres near a 400-series highway use it. For example, centres in Barrie use Highway 400, while centres in Oshawa use Highway 401. Call your local centre to confirm the route.
What speed should I drive on the highway during the G test?
Drive at or near the posted speed limit (usually 100 km/h). A range of 90–105 km/h is generally acceptable. Driving significantly below the limit (e.g., 80 km/h) is a fault as it impedes traffic flow.
Can I fail the G test for not merging fast enough?
Yes. You must use the full acceleration lane to reach highway speed before merging. Stopping at the end of the ramp is an automatic fail. Merging too slowly (under 80 km/h) is also a serious fault.
How long does the G road test take?
About 30–45 minutes, including the highway portion. The highway section itself is typically 10–15 minutes. This is longer than the G2 test, which is usually 20–30 minutes.
What happens if I miss my highway exit?
Stay calm and continue to the next exit. Do not brake suddenly or cut across lanes. The examiner will redirect you — missing an exit is not a fail as long as you handle it safely.
Is cruise control allowed on the G test?
Yes, cruise control is allowed. However, you must still check your mirrors regularly and be ready to disengage it quickly if traffic conditions change.