R4.2
At a glance
- Sign code
- R4.2
- Type
- Regulatory
- Official meaning
- A control sign indicating that the roadway is a one-way roadway carrying traffic in the direction of the arrow (to the right).
What the One-way roadway sign means
Traffic on this roadway flows in one direction only - to the right - as shown by the arrow.
What you must do
Travel only in the direction the arrow points; never drive against the flow on a one-way roadway.
Know the mistake this sign turns on
Full access adds the confusion One-way roadway is most often mistaken for and the hint for the test, on this sign and every other one — plus practice questions and timed mock papers. The practice sample and the readiness test are free.
See the free practice testSources
- Road Traffic Signs chart, National Department of TransportThe official chart. Sign R4.2 was checked against it, artwork and meaning, before being published here.
- National Road Traffic Regulations, 2000 — Schedule 1Where the prescribed meaning of each road traffic sign is set out.
Last updated 2026-08-23.