How NSW Fines Slow Drivers

by Dylan Anderson

•

Founder @ CarExplore

•

May 07, 2025

•

3 min read

Driving under the speed limit is not inherently illegal in New South Wales. However, driving excessively slowly in a way that obstructs other road users can result in a fine. Under NSW Road Rules 2014 - Rule 125, a driver must not "unreasonably obstruct the path of another driver or pedestrian."

If you're traveling significantly below the speed limit without valid cause and impeding traffic, you could face a fine of up to 20 penalty units. With each unit valued at $110, this equates to a maximum penalty of $2,200.

When Driving Slowly Is Acceptable

There are specific circumstances where driving below the posted speed limit is reasonable:

Adverse weather: Driving cautiously during heavy rain, fog, or snow is permitted.
Heavy vehicles: Trucks and large vehicles may need to drive slower on inclines or declines.
Cyclists and mobility devices: These road users may operate at lower speeds for safety and are not held to motor vehicle speed expectations.

Keeping Left: What the Law Requires

In NSW, drivers must keep to the left on multi-lane roads where the speed limit is over 80km/h, unless:

You are overtaking.
You are turning right or making a U-turn.
There is a sign or marking requiring you to use the right lane.
You are avoiding an obstruction.
Traffic is congested in all lanes.
The right lane is a special purpose lane that you are permitted to use.
You are not turning left but the left lane must turn left.

If a 'Keep Left Unless Overtaking' sign is displayed, it applies regardless of the speed limit.

Tailgating: The Risk and the Fine

Tailgating is explicitly banned under Road Rules 2014 - Rule 126. Drivers must maintain a safe following distance to allow for a safe stop if necessary.

In NSW, tailgating carries an on-the-spot fine of $544 and incurs 3 demerit points.

Conclusion

While it's legal to drive under the speed limit in NSW, doing so unreasonably may result in penalties. Always maintain awareness of your speed, surrounding traffic, and lane discipline to ensure you’re operating within the law.

Disclaimer: This article is for general informational purposes only and does not constitute legal advice. Road rules and penalties may change. Always consult the official NSW legislation or authorities for the most up-to-date information.