3.3 Pavement Markings & Lane Delineation
Key Takeaways
Yellow lines separate traffic streams traveling in opposite directions, while white lines separate lanes traveling in the same direction or mark the road's right shoulder edge.
A solid line at the left of your lane means it is unsafe to pass; a broken line at the left means you may pass if the way is clear and there are enough broken lines ahead to finish.
Continuity lines are broken lines that are wider and closer together than normal; on your left they mean your lane is ending or exiting, and on your right they mean your lane continues.
White diamond pavement symbols designate reserved lanes, including High-Occupancy Vehicle (HOV) lanes, bus-only lanes, and bicycle lanes.
Bike lanes are reserved for cyclists and usually marked with a solid white line; enter or cross one to turn right only after making sure it is safe, and stop behind a bike box, not in it.
Pavement Markings & Lane Delineation
Quick Summary: Pavement markings painted directly on road surfaces provide vital regulatory instructions, lane boundaries, and hazard warnings. Yellow lines separate traffic traveling in opposite directions, while white lines separate traffic traveling in the same direction or mark the road's right shoulder. Mastering broken versus solid lines, continuity lines, stop lines, two-way left-turn lanes, diamond reserved lanes and bicycle markings is essential for the Ontario G1 knowledge test.
Pavement markings work in conjunction with overhead and roadside signage to organize traffic flow. Because markings are located directly in the driver's forward field of view, they provide immediate spatial guidance on lane positioning, legal passing zones, and stopping boundaries.
Yellow Lines: Separating Opposing Traffic Flows
In Ontario, yellow lines always separate traffic traveling in opposite directions. When driving on a two-way street or undivided highway, the yellow lines will always be located to your left.
1. BROKEN YELLOW: <--- Traffic [ - - - - - - - - ] Traffic ---> (Passing Permitted)
2. SINGLE SOLID YELLOW: <--- Traffic [ ---------------- ] Traffic ---> (Unsafe to Pass)
3. DOUBLE SOLID YELLOW: <--- Traffic [ ================ ] Traffic ---> (Passing Prohibited)
4. SOLID & BROKEN COMBO: <--- Traffic [ --------- - - - ] Traffic ---> (Passing only on broken side)
1. Broken Yellow Centre Line
A broken yellow line painted along the centre of a two-lane road indicates that passing is permitted in both directions. You may steer into the opposing lane to pass a slower vehicle ahead only when:
- The oncoming lane is completely clear of traffic for a sufficient distance.
- You can complete the pass and return to your lane without exceeding the posted speed limit.
- You can complete the pass before reaching any upcoming curve, hill crest, intersection, or solid line.
2. Solid Yellow Line on Your Side
The handbook's rule is simple: a solid line at the left of your lane means it is unsafe to pass. Its example driver "should not pass" when the solid line is on their side. Solid lines are painted where sight distance is too short for a safe pass, such as approaching hills, curves and intersections. On the G1 test, the answer is always: do not pass across a solid line on your side.
3. Double Solid Yellow Lines
Two parallel solid yellow lines painted down the centre of the roadway indicate that passing is strictly prohibited in both directions. Double solid yellow lines are installed on blind hills, around sharp curves, near railway crossings, and through hazardous road corridors where oncoming sight distance is insufficient for safe overtaking. Crossing double solid yellow lines to pass is an illegal and extremely dangerous violation.
4. Combination Solid and Broken Yellow Lines
Where roadway sightlines are asymmetrical (such as approaching the crest of a hill from one direction while descending from the other), a solid yellow line is paired parallel to a broken yellow line:
- Broken Line on Your Side: You may cross the centre line to pass when safe.
- Solid Line on Your Side: You are strictly forbidden from crossing the centre line to pass.
5. Two-Way Left-Turn Centre Lanes (TWLTL)
On wide suburban commercial arterials with frequent strip malls and driveways, the roadway often features a dedicated centre lane known as a two-way left-turn lane:
- Appearance: Marked on both outer edges by a solid yellow line with an inner broken yellow line, accompanied by pairs of opposing white left-turn curved arrows painted on the road surface.
- Purpose: Used exclusively by vehicles traveling in either direction to execute left turns into driveways, business entrances, or side streets.
- Prohibited Use: A two-way left-turn lane is never to be used as a general travel lane, an acceleration lane, or a passing lane to bypass congested traffic.
White Lines: Same-Direction Traffic & Road Edges
In Ontario, white lines separate traffic traveling in the same direction, or mark physical roadway boundaries and infrastructure.
1. BROKEN WHITE: [ Traffic -> ] - - - - - - [ Traffic -> ] (Lane Change Permitted)
2. SOLID WHITE: [ Traffic -> ] ----------- [ Traffic -> ] (Stay in Lane)
3. SOLID WHITE EDGE: [ Traffic -> ] =========== [ Paved / Gravel Shoulder ]
1. Broken White Lines
Broken white lines delineate travel lanes on multi-lane streets, expressways, and one-way roadways where all traffic moves in the same direction. Drivers may change lanes across broken white lines after signaling and performing mirror and shoulder blind spot checks.
2. Solid White Lines
A solid white line between lanes moving in the same direction indicates that lane changing is discouraged or restricted due to specific hazards. Solid white lines are painted:
- On approaches to major signalized intersections (to prevent last-minute lane cutting).
- Inside highway tunnels and across bridges (where lane changes risk severe side-swipe collisions).
- On highway entrance and exit ramps to channelize vehicles into dedicated merging streams.
- As buffer delineators for bicycle lanes and HOV lanes.
3. Solid White Edge Lines (Fog Lines)
A solid white line painted along the right side of the road marks the outer edge of the travel lane and separates it from the shoulder. Fog lines provide critical guidance during nighttime driving, heavy rain, thick fog, and snowstorms, helping drivers keep their vehicle centered in the lane.
Stop Lines, Crosswalks & Painted Islands
Thick Solid White Stop Lines
At intersections controlled by stop signs or traffic signals, as well as railway level crossings, a thick solid white line is painted perpendicularly across the travel lane:
[ INTERSECTION ]
=======================================================
[ Marked Crosswalk ]
-------------------------------------------------------
[ STOP LINE ] ========================================
^
[ FRONT BUMPER ]
[ VEHICLE ]
- Legal Stopping Rule: When stopping for a red light or stop sign, you must bring your vehicle to a complete stop with the front bumper behind the thick white stop line.
- Hierarchy of Stopping Boundaries (handbook):
- Stop at the stop line if one is marked.
- If there is no stop line, stop at the crosswalk, marked or not.
- If there is no crosswalk, stop at the edge of the sidewalk.
- If there is no sidewalk, stop at the edge of the intersection.
Pedestrian Crosswalk Markings
The handbook describes a crosswalk as two parallel white lines painted across the road, though crosswalks at intersections are not always marked. Some are marked with ladder striping. Do not stop over or inside a crosswalk.
Pedestrian Crossover Markings
Pedestrian crossovers are marked by two white double parallel lines across the road with an X in each lane approaching it, together with signs and overhead yellow lights. Newer crossovers may use ladder stripes and "shark's teeth" yield lines. Drivers and cyclists must stop before the line and yield until pedestrians have completely crossed and cleared the road.
Continuity Lines
Continuity lines are broken lines that are wider and closer together than regular broken lines. You see them at on-ramps, off-ramps and lane drops:
- Continuity lines on your left: your lane is ending or exiting; change lanes if you want to keep going in your current direction.
- Continuity lines on your right: your lane continues unaffected.
Markings Around Fixed Objects
Two solid lines painted on the pavement guide traffic away from fixed objects such as bridge piers or concrete islands, and yellow-and-black markings are painted on the objects themselves as warnings.
Painted Islands and Medians
Areas of roadway painted with diagonal white or yellow chevrons or solid striped borders represent painted traffic islands or channelizing medians:
- They are installed to separate conflicting turning lanes from through-lanes or protect concrete median barriers.
- Legal Rule: Drivers are strictly prohibited from driving on, driving over, stopping upon, or parking across painted traffic islands or medians.
Diamond Markings & Reserved Lanes
Large white diamond symbols painted on the road surface identify reserved lanes dedicated to specific vehicle classes. Diamond markings are used for:
- High-Occupancy Vehicle (HOV) Lanes: Dedicated lanes on 400-series expressways requiring 2+ occupants, green plate EVs, buses, or taxis.
- Dedicated Public Transit Lanes: Reserved municipal curb lanes restricted to public transit buses during peak hours.
- Dedicated Bicycle Lanes: Roadway corridors reserved exclusively for cyclists.
Overhead or roadside signs accompany diamond road markings to state the specific operational hours, vehicle restrictions, and occupancy requirements.
Bike Lanes, Bike Boxes and Sharrows
Ontario municipalities use several bicycle markings. The handbook describes each one:
[ General Lane ] | [ Bike Lane ] | [ Curb ]
[ Traffic -> ] | [ <Bike> ] |
| [ <Bike> ] |
Right turn: signal, check mirror and right blind spot,
enter or cross the bike lane only when it is safe, then turn
Rules for Drivers Around Bicycle Markings
- Bike lanes are reserved for cyclists. They are typically marked by a solid white line. Do not drive, stop or park in them.
- Turning right across a bike lane: Sometimes you must enter or cross a bike lane to turn right at a corner or driveway. The handbook says to take extra care, enter the bike lane only after making sure you can do so safely, and then make the turn. Before turning, signal and check your mirrors and the blind spot to your right so you do not cut off a cyclist.
- Bike boxes: A painted box at an intersection with a white bicycle symbol inside. Stop behind the bike box for a traffic signal; do not stop in it. It lets cyclists wait ahead of cars and helps prevent turning collisions.
- Sharrows: Two chevrons painted above a bicycle symbol mean the lane is shared. Cars or bicycles may be in the lane, so watch for cyclists.
- Passing a cyclist: Leave at least one metre between your vehicle and the cyclist where practical. Failing to do so can bring a fine and 2 demerit points. Whenever possible, change lanes to pass (Section 5.3).
You are on a multi-lane road and notice broken lane lines on your left that are wider and closer together than normal. What do they mean?
Your lane is ending or exiting, so change lanes if you want to continue in your current direction
You may pass on either side
The lane is reserved for buses
You are approaching a school zone
What do two solid yellow lines painted down the centre of an undivided two-lane highway indicate?
Passing is permitted during daylight hours only
Left turns into driveways are illegal
The lane is reserved for commercial freight trucks
Passing and crossing into the opposing lane is strictly prohibited in both directions
Down the centre of a two-lane highway, there is a solid yellow line on your side and a broken yellow line on the opposite side. What does this pavement marking mean for you?
You are strictly prohibited from crossing the centre line to pass
You may cross the centre line to pass whenever traffic is light
Both directions may pass simultaneously
The speed limit is automatically reduced to 40 km/h
Where must a driver bring their vehicle to a complete stop at an intersection controlled by a red traffic light or stop sign when a thick white stop line is painted across their travel lane?
Directly centered over top of the white line
Immediately before the white stop line, keeping the front bumper behind it
Past the stop line with front wheels in the crosswalk to get a better view
Anywhere within 5 metres past the stop line
Sections you finish are checked off in the contents.