Ontario G1 Road Signs Guide 2026 — Every Sign You Need to Know

The Ontario G1 knowledge test splits its 40 multiple-choice questions evenly between road signs (20) and rules of the road (20). You need 80% in each section, so a weak signs score cannot be rescued by a strong rules score. The signs come from the Official MTO Driver's Handbook, which groups every sign on Ontario roads into five families: regulatory, warning, temporary (construction), information and guide, and school and pedestrian zones. Learn the family and you have most of the answer already.

1. Regulatory signs — "you must do this"

Regulatory signs are the enforceable rules. They are mostly rectangular (vertical), black on white, or red and white when they are prohibitions.

• Stop sign — the only octagon on Ontario roads. Red with white border. You must come to a complete stop at the stop line (or crosswalk, or intersection edge) before proceeding.
• Yield sign — the only downward-pointing triangle. Red border, white centre. Slow or stop and give the right of way to traffic in the intersection and to pedestrians.
• Do Not Enter — red circle, white horizontal bar. You are facing a one-way street the wrong way, or an exit ramp.
• One Way — black arrow on white rectangle. Traffic in that lane moves only in the direction of the arrow.
• Speed limit — black number on white rectangle. The maximum, not a suggestion.
• No parking / no stopping / no standing — different symbols with a red circle and slash. Know the difference: no stopping is the strictest, no standing allows picking up or dropping off, no parking allows standing to actively load.
• No U-turn — U-arrow with red slash.
• Reserved HOV lane — diamond with a passenger count. Only vehicles meeting the posted minimum may use it during the posted hours.

2. Warning signs — "something ahead, slow down"

Warning signs are always yellow diamonds (or fluorescent yellow-green for pedestrian/school warnings). They do not force an action — they tell you to prepare for one.

• Curve ahead / sharp turn — a curving arrow. A straighter arrow means a gentler curve.
• Intersection ahead — a cross or T symbol. Expect cross traffic.
• Two-way traffic — two opposing arrows. Usually posted where a one-way becomes two-way.
• Divided highway begins / ends — triangles narrowing or widening. Pay attention to lane use after the sign.
• Lane ends — a merging arrow. The right lane is ending; merge left (or vice versa).
• Pedestrian crossover (PXO) — fluorescent yellow-green pentagon. In Ontario, you must stop and remain stopped at a PXO until pedestrians have reached the far curb.
• Bicycle crossing — fluorescent yellow-green diamond with a bicycle symbol.
• Slippery when wet — a car with wavy tracks.
• Railway crossing ahead — yellow round sign with a black X and RR. The crossbuck X at the tracks themselves is a yield to any approaching train.

3. Temporary condition (construction) signs

Temporary signs are orange with black lettering, and they override whatever the permanent signs normally say.

• Construction ahead — an orange diamond with a worker or digger. Slow down and expect lane shifts.
• Flagperson ahead — a worker with a flag. The flagger's instructions override traffic signals.
• Lane closed ahead — orange arrow pointing to the open lane. Merge early.
• Reduced speed limit zone — temporary speed limits in work zones are enforceable and come with fines that double when workers are present. This is a frequent G1 test question.
• Detour — orange arrow routing you around the closure.

4. Information and guide signs

Information signs are usually green (highway direction and distances), blue (driver services — gas, food, lodging, hospital), or brown (recreation, parks, historical sites). They are not enforceable but they come up on the 2026 G1 test because learners confuse them with regulatory signs.

• Green route markers — King's Highway shield for 400-series highways, trillium for secondary highways.
• Blue service signs — fuel pump, knife and fork, bed, white H in a square (hospital), telephone, information.
• Brown signs — provincial parks, campgrounds, museums, historical plaques.

5. School zone and pedestrian signs

Fluorescent yellow-green pentagons and diamonds mark every zone where children or pedestrians need extra protection. The MTO handbook devotes a full chapter to these for a reason.

• School zone sign — pentagon, fluorescent yellow-green. The reduced speed limit applies during the posted hours on school days.
• School crosswalk — pentagon with two walking children. Stop for the crossing guard; stay stopped until all children (and the guard) are off the road.
• School bus loading zone — regulatory sign showing the stopping zone for buses.
• Playground ahead — fluorescent yellow-green with children playing. Expect children, slow down.

Three signs that trip up G1 candidates on the 2026 test

1. Pedestrian crossover (PXO) vs. crosswalk at a stop sign. At a PXO you stop and stay stopped until the pedestrian has reached the opposite curb — even if they are already past your lane. At a four-way stop crosswalk, you only need to yield while the pedestrian is in your half of the road.
2. Yield vs. Yield Ahead. A red-and-white downward triangle is a regulatory yield — do it now. A yellow diamond with a smaller triangle inside is a warning — a yield is coming, start slowing.
3. Reserved HOV lane vs. bicycle lane. Both are marked by diamonds. HOV lanes have an occupancy number; bicycle lanes have a bicycle symbol. Entering a reserved lane without meeting the restriction is a $110 fine in 2026.

How to drill signs without burning out

Do not try to memorise 200+ signs individually. The MTO handbook's own "Know Your Signs" summary groups them exactly the way the test does. Three habits that work:

1. Spend one evening reading the Signs chapter of the handbook end to end, learning the shape-and-colour system first.
2. Run the Ontario G1 road signs test once a day for a week. Mark the signs you miss and look them up in the handbook afterwards.
3. Finish with two full 40-question G1 practice tests, in order, in one sitting — the way the real one is written. If you hit 18/20 on signs two days in a row, you are ready to book.

The signs section is the fastest to raise a score on, and the hardest to recover if you skip it. Once the system is in your head, it stays there.