Single vs Double Solid Lines (2024)

This page has been put together using Qld road rules legislation as of 2009.
It is in no way purposed or designed to be used for legal defence or legal advice!
It is designed to help you know and obey the road rules.
Not to justify bad driving behaviours.

There are a few ways the centre line markings can be used to indicate what rules are relevant when it comes to turning and overtaking. Some quieter, less used roads don't have a line at all, more frequented roads have a dotted or broken centre line.

In this article we will be looking at the difference between a Single Solid White Line and Double Solid White Lines. Do you know the difference?

Single Solid White Line

Single vs Double Solid Lines (1)Turning Right

The first image shows a Single Solid White line down the centre of the road.

Both of these cars ARE permitted to turn right as you are allowed to cross a Single Solid White Line if you are entering or leaving the road. Turning into another road is counted.

Overtaking

You are not permitted to overtake another vehicle where you must cross a Single Solid White Line to do so unless:

  • You need to cross the line to avoid a hazard or obstruction.
  • You are obeying a traffic control device.
  • You are overtaking a bicycle.

But then ONLY if it is SAFE to do so.

Double Solid White Lines

Single vs Double Solid Lines (2)

Turning Right

The second image shows a Double Solid White Line down the centre of the road.

Neither of these cars are permitted to make the Right turn they are indicating as you are not permitted to turn over Double white lines unless:

  • There is a break in the lines which you can cross through.

Overtaking

You are not permitted to overtake another vehicle where you must cross a Single Solid White Line to do so unless:

  • You need to cross the line to avoid a hazard or obstruction.
  • You are obeying a traffic control device.
  • You are overtaking a bicycle.

But then ONLY if it is SAFE to do so.

Road Rules are always under review and are often changed or updated. This page was accurate at time of publishing, while we endeavour to keep these pages up to date we may occasionally miss something. You as a road user are expected to keep up to date with the Road Rules.
Single vs Double Solid Lines (2024)

FAQs

What is the difference between single solid and double solid? ›

A single solid yellow line means that passing is not advised but you may pass, with extreme caution. A single dashed yellow line means passing is allowed. A double solid yellow line means passing is not allowed under any circ*mstances.

What is the difference between 1 and 2 solid lines? ›

Sometimes a continuous line is accompanied by a second solid line, bringing a double whammy of consequences should you ever cross it. Put simply: a motorist should never cross double continuous lines unless manoeuvring around an obstruction or cyclist, and only if it can be done safely.

What is the difference between single and double lines? ›

A double white line indicates that lane changes are prohibited. A single white line indicates that lane changes are discouraged. A dashed white line indicates that lane changes are allowed. Symbols are used to indicate permitted lane usages.

What is the difference between double and single yellow lines? ›

Double lines mark lengths of road where there is no waiting at any time. There is no longer any need for signs to be placed explaining this. Single lines indicate a shorter period when waiting is not permitted, such as Monday to Saturday 8am to 6pm.

What is the solid line rule? ›

You are not permitted to overtake another vehicle where you must cross a Single Solid White Line to do so unless: You need to cross the line to avoid a hazard or obstruction. You are obeying a traffic control device.

What does a single solid line represent? ›

A single solid white line marks traffic lanes going in the same direction.

What is the difference between single lane and double lane? ›

Single-lane roads have only one lane of traffic in each direction, while dual-lane roads have two lanes of traffic in each direction. Multi-lane roads can have three or more lanes of traffic in each direction, with some highways having as many as ten or more lanes.

What do the single and double lines represent? ›

A single line indicates a bond between two atoms (i.e., involving one electron pair), double lines (=) indicate a double bond between two atoms (i.e., involving two electron pairs), and triple lines (≡) represent a triple bond, as found, for example, in carbon monoxide (C≡O).

What is the difference between single line drawing and double line drawing? ›

In electrical diagrams, a single line is often used to represent a single-phase circuit, while a double line is used to represent a three-phase circuit.

What is a single line? ›

A single-line diagram (also known as an SLD or one-line diagram) is a simplified representation of an electrical system. Symbols and lines are used to represent the nodes and connections in the system, and electrical characteristics may be included as well.

What is the difference between two solid yellow lines and two solid white lines? ›

Double yellow lines usually separate opposing lanes of traffic, creating a no-passing zone in both directions. Double white lines usually separate lanes of traffic heading on the same direction. The intent is to prohibit changing lanes in areas of hazard to reduce the potential conflicts.

What does a double solid yellow line mean? ›

A double solid yellow line indicates that there is absolutely no passing or crossing the double solid yellow line at any time. Shifting into another lane or attempting to pass another vehicle is not allowed when a double solid yellow line is present.

Can you load and unload on a single yellow line? ›

Loading or unloading on yellow lines

Loading or unloading can take place on single or double yellow lines without kerb markings, for an unlimited time before 11am and after the end of controlled hours, or 6.30pm (whichever is earlier).

What are 2 different straight lines? ›

What is the Difference Between Parallel and Perpendicular Straight Lines? The angle between two parallel lines is 0 degrees, and the angle between two perpendicular lines is 90. Parallel lines are aligned in the direction of each other, whereas perpendicular lines are aligned at a 90 angle with each other.

Can you cross on a single solid line? ›

Solid White Line

You should not cross this line to change lanes unless necessary and safe to do so. In some states, it is illegal to cross a solid white line; in California, it is legal to do so. Only cross a solid white line if it is safe to do so; solid white lines are meant to discourage you from changing lanes.

What is a solid line? ›

"Solid line" means a line with no breaks.

What are solid white lines used to 1 point? ›

Solid white lines divide lanes of traffic traveling in the same direction. Solid white lines are also used to mark the right edge of the road. As a general rule, broken traffic lines can be crossed and solid lines cannot, except when making a turn.

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