Beginner Driver Education · Rules of the Road
Understanding Other Road Signs: Slow-Moving Vehicles and More
Driviology Road Safety Education Team
What this actually means for you
Rules like this are not trivia for the written test. They decide what you do in the two or three seconds when there is no time to think. The "slow-moving vehicle" sign is an orange triangle with a red border. Learn it as a habit now, not as a fact to recall, because at a real intersection there is only time for the habit.
Other Road Signs: Safety and Awareness
Other Signs
The "slow-moving vehicle" sign is an orange triangle with a red border. It alerts other drivers that the vehicle ahead will be travelling at 40 km/h or less. When on the road, farm tractors, farm implements/machinery, and vehicles incapable of sustaining speeds over 40 km/h must display the slow-moving vehicle sign. Watch for these slow-moving vehicles and reduce your speed as necessary.
EDR signs are used during the unscheduled closure of a provincial highway when OPP detour all traffic off the highway. The EDR markers are located along alternative routes and provide direction to motorists around the closure and back onto the highway.
This placard indicates a long commercial vehicle (LCV), a double trailer up to 40 metres long. It is essential to recognize an LCV on the highway based on its rear signage and anticipate its extended length and limited speed when preparing to pass one.
Using this on Ontario roads — and on your road test
This is not just written-test material. The same rules are scored live on your G2 and G road tests, and most of them come up in the first five minutes: stops, turns, lane use, and right-of-way at ordinary intersections. In the GTA you will meet the full set quickly — HOV lanes on the 401 and QEW, reserved streetcar and bus lanes downtown, school zones with reduced limits, and construction signage that changes a road week to week. Learn the rule as a behaviour, not a definition, and it will still be working for you years after the test.
Questions drivers ask us
Can you explain other road signs in simple terms?
It alerts other drivers that the vehicle ahead will be travelling at 40 km/h or less.
What happens if I get this wrong on the road?
It depends on the rule, but traffic offences in Ontario can bring a fine and demerit points, and they stay on your driving record. For new drivers the stakes are higher — repeat or serious offences can lead to a licence suspension, on top of what they do to your insurance.
Do I need to know this for the G1 written test too?
Yes — this is core G1 knowledge, and it is tested again in real life on the G2 and G road tests. The written test checks that you know the rule; the road test checks that you actually do it when nobody is prompting you.