Pavement markings work alongside traffic signs and signals to guide drivers. Their meaning can affect whether you may change lanes, pass another vehicle, turn or must stop.

1. Know the difference between yellow and white lines

The colour of a road marking helps you understand how traffic is organized.

• Yellow lines generally separate traffic travelling in opposite directions.
• White lines generally separate lanes of traffic travelling in the same direction.

You will commonly see yellow centre lines on two-way roads and white lane lines on multi-lane roads.

Recognizing the difference helps you understand whether you are approaching opposing traffic, another lane moving in the same direction or a change in road layout.

2. Understand what solid and broken lines mean

The pattern of a line provides information about crossing restrictions, passing and lane changes.

• Broken lines: Crossing is generally permitted when the manoeuvre is legal and safe.
• Solid lines: Crossing is generally restricted. The meaning depends on the type and location of the marking and the applicable provincial or territorial rules.

A broken line does not guarantee that passing or changing lanes is safe. You must still check traffic, visibility, road conditions and the space available to complete the manoeuvre.

Likewise, do not assume that a solid line may be crossed simply because no other vehicle is approaching. Some markings have specific rules and exceptions.

3. Know when passing across a yellow line is prohibited

Yellow centre lines separate traffic travelling in opposite directions. Before passing, you must understand what the markings on your side of the road mean.

• A broken yellow line generally indicates that passing may be permitted when the road ahead is clear and the manoeuvre is safe and legal.
• A solid yellow line generally indicates a passing restriction. The exact rule and any exceptions depend on the jurisdiction and circumstances.
• Double solid yellow lines generally indicate a no-passing restriction.

Never assume that a line has the same legal effect in every province or territory. For example, Alberta’s Driver’s Guide describes an exception for passing across a single solid yellow line within an urban area. Other jurisdictions may apply different rules.

Before passing, consider visibility, oncoming traffic, intersections, curves, hills and whether you have enough distance to return safely to your lane.

Our rural roads guide covers blind crests and farm machinery, two situations that can make passing particularly dangerous.

4. Read a solid line beside a broken line correctly

Some two-way roads have a solid yellow line beside a broken yellow line. The passing restriction generally depends on which line is closest to your vehicle.

• Broken line on your side: Passing may be permitted when safe and legal.
• Solid line on your side: Passing is generally prohibited.

This arrangement can give drivers travelling in opposite directions different passing conditions on the same stretch of road.

For example, visibility may be restricted for drivers approaching a hill from one direction, while drivers travelling in the opposite direction have a clearer view ahead.

Before you pass: a four-step check

Signalling does not make an unsafe or prohibited pass acceptable.

5. Recognize lane boundaries and lane transitions

White lines commonly separate lanes travelling in the same direction.

Where a lane change is permitted, you must still observe surrounding traffic, signal appropriately and ensure there is a safe gap. Our lane change guide explains the observation and positioning sequence.

Road markings may change near highway exits, entry ramps, merging areas and other changes in road layout. Some lane boundaries use wider or different patterns to distinguish them from ordinary lane lines.

Pay attention to these changes and follow the signs and markings that apply to your lane.

Plan lane changes early. Avoid sudden movements near exits, intersections and merging traffic.

6. Follow directional arrows and lane-use markings

Painted arrows show the direction or directions of travel designated for a lane.

Common examples include:

• Straight-ahead arrows.
• Left-turn arrows.
• Right-turn arrows.
• Combination arrows indicating more than one permitted movement.

Some lanes are designated for turning traffic only. Others allow drivers to continue straight or turn, depending on the markings and accompanying signs.

Enter the correct lane before reaching the intersection. Check the arrows and signs together. If you miss your intended turn, continue safely and find another route rather than making a sudden correction across traffic.

Lane selection is also important when approaching a roundabout, where you should identify the appropriate lane before entering.

7. Stop before stop lines and keep crosswalks clear

A stop line identifies where a driver must stop when required by a traffic sign or signal.

At a stop sign or red traffic signal, stop at the marked line. If there is no stop line, follow the stopping-position rules in your province or territory’s driver’s handbook.

Crosswalk markings identify areas where pedestrians may cross. Keep marked crosswalks clear and do not block them while waiting for traffic to move.

When turning, check for pedestrians crossing the road you are entering. Look carefully in both directions and remain alert for people who may be difficult to see.

Our intersection scanning guide explains how to check the intersection before proceeding.

8. Understand bicycle lanes and reserved-lane markings

Pavement symbols can identify lanes intended for particular road users or vehicle types.

• A bicycle symbol identifies a bicycle lane or designated cycling space.
• Diamond markings may identify lanes reserved for specific vehicles or uses, such as certain bus or high-occupancy vehicle lanes.

Read the signs and markings to determine who may use a reserved lane and whether restrictions apply at particular times.

Do not use a bicycle lane as an ordinary travel or parking lane. Where you need to cross a bicycle lane to turn or enter another road, check carefully for cyclists and follow the applicable rules.

9. Recognize railway crossing pavement markings

Railway crossings may have pavement markings, including an X, stop lines or other warning markings. These may be accompanied by railway crossing signs, flashing signals, bells and gates.

As you approach a crossing, watch for warning devices and assess the traffic conditions ahead.

Make sure there is enough room on the other side for your entire vehicle to clear the tracks before entering. Never enter a crossing if congestion could leave your vehicle stopped on the tracks.

Always obey railway signals and crossing controls, even when the tracks appear clear.

Our railway crossings guide covers the signals, stopping rules and what to do if your vehicle stalls.

For additional guidance, consult Transport Canada’s Grade Crossings Handbook.

10. Adjust when markings are worn, obscured or difficult to see

Pavement markings are not always easy to identify. Rain, darkness, snow, ice, construction and normal wear can make lines difficult to see. In winter, snow may cover them completely.

When markings are unclear:

• Reduce speed as conditions require.
• Increase following distance.
• Look for traffic signs, temporary markings and other traffic controls.
• Pay attention to the road layout and the movement of surrounding traffic.
• Avoid sudden lane changes or other manoeuvres based on assumptions.

Temporary construction markings may change the normal lane arrangement. Follow the applicable temporary signs, traffic controls and directions from authorized personnel.

Do not assume a restriction no longer applies simply because a pavement marking is difficult to see.

Our guides on driving in bad weather and winter driving provide further advice.

Learn the markings. Practise recognizing them.

Reading about road markings is a starting point. Recognizing them while driving and understanding how they affect your decisions takes practice.

Use this learning cycle:

During supervised practice, ask the driver to identify an approaching marking and explain what it means before reaching it. Discuss the decision early, while there is still time to respond safely.

For knowledge-test preparation, use practice questions to check your understanding and identify areas that need more study.

The bottom line

Pavement markings help drivers understand how traffic is organized, where they may travel and when a manoeuvre is restricted. Recognize the markings, read the road ahead and combine that knowledge with observation and sound judgment.

Read the road before you move.