Practical guide

How left-side roundabouts work

On a conventional roundabout in left-hand traffic, you travel clockwise around the central island. The important work happens before you enter: read the layout, choose a lane and find a safe gap.

By the Leftside team · Updated

Circulation
Clockwise
Before entry
Read signs and choose your lane
Local detail
Priority and signalling rules vary

Start with the approach, not the steering

Find your destination on the approach sign, then follow the road’s lane arrows. Slow early enough to make a decision at the entry line. A roundabout may have signals, several lanes or markings that guide you into a particular exit, so a generic “always use this lane” shortcut is unreliable.

Picture the entry from your seat: you join the clockwise flow and keep the central island on your right. You do not turn right across the island to reach an exit on the right-hand side of the approach.

A conventional UK roundabout: three common routes

For a standard UK layout without different signs or markings:

  • First exit left: approach in the left lane, signal left and remain left to exit.
  • Intermediate exit: select the appropriate lane; normally no approach signal. Signal left after passing the exit before yours.
  • Right exit or full circle: approach in the right lane and signal right. Signal left after passing the exit before yours, moving left safely to leave.

Give priority to traffic from your right unless directed otherwise. Give cyclists room, including those staying left to continue around. See Highway Code: junctions and roundabouts rules 184–190 for the full guidance, including mini-roundabouts.

Do not export a UK shortcut to every country

NSW’s rule is to give way to vehicles already on the roundabout, including those entering from other approaches. Signal left on exit when practical. The NSW Government: roundabouts guidance sets out the local details. Ireland and New Zealand also have their own road codes; use the destination guide before travelling.

At a signal-controlled roundabout, obey the signals and markings for your lane. At a spiral layout, follow your marked lane rather than trying to trace a perfect circle. These layouts need more observation than simply counting exits.

If the exit goes wrong, keep the manoeuvre predictable

A missed exit is a navigation problem. Do not cut across an occupied lane, stop suddenly in the circulating roadway or reverse. Continue along a permitted path and reroute. Another circuit is only an option when your lane and the layout allow it; some lanes direct you out.

Before changing lanes, check mirrors, blind spots and space. An indicator announces an intention; it does not reserve the lane. Look for pedestrians and cyclists around the exit as well as vehicles on the roundabout.

Rehearse the sequence in a virtual roundabout

Open Around the right way. First identify the clockwise path using the aerial view, then repeat in the cockpit. Practise approach, observation, entry and the left exit signal as separate steps. Use the controls guide if needed. Simplified virtual traffic does not establish that a real gap is safe or cover every multilane design.