Driving Guides

Roundabouts and Lane Merging NSW

Author: Pro Learners TeamUpdated: June 2026Read Time: 5 min read

South-West Sydney is famous for its rapid development, and with that comes an endless supply of roundabouts and merging lanes. For learner drivers, multi-lane roundabouts (especially those found around Gregory Hills and Edmondson Park) are often cited as the most confusing and intimidating obstacles on the road.

The Core Rule of Roundabouts

The golden rule of any roundabout in NSW is: You must give way to any vehicle already in the roundabout.You do not automatically give way to the right; you give way to vehicles already circulating. However, because traffic flows clockwise, vehicles will approach from your right.

Indicating at Roundabouts

Indicating incorrectly is a major point deduction in the Service NSW driving test. Here is the simple formula:

  • Turning Left: Indicate left on approach, and keep the left indicator on until you exit.
  • Going Straight: Do not indicate on approach. However, you must indicate left just after you pass the exit immediately before the one you want to take (if practical).
  • Turning Right (or U-Turn): Indicate right on approach. Keep the right indicator on while circulating, then switch to a left indicator just after you pass the exit immediately before the one you want to take.

Mastering Multi-Lane Roundabouts

Multi-lane roundabouts add the complexity of lane selection. Always read the approach signs and arrows painted on the road.

  • Generally, use the left lane to turn left or go straight.
  • Use the right lane to go straight, turn right, or perform a U-turn.
  • Crucial: You must not change lanes while inside a roundabout. Choose your lane early, stick to it, and exit into the corresponding lane.

The Art of Lane Merging (Zip Merging)

Merging is another area where learners struggle with gap selection and speed management. There are two distinct types of merges in NSW:

1. Zip Merging (No dotted line)

When two lanes merge into one without any lane lines marked between them (often called a zip merge), the vehicle that is furthest ahead has the right of way. You must yield to the car whose nose is in front of yours.

2. Changing Lanes (Crossing a dotted line)

When your lane comes to an end and you must cross a dotted line to join continuing traffic (like merging onto a motorway), you must give way to all traffic already in that lane.

The Secret to Smooth Merging: Speed match! The biggest mistake learners make is braking when trying to merge. You must accelerate to match the speed of the traffic in the lane you are joining, perform a head check, and slide into a safe gap.

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