R121
At a glance
- Sign code
- R121
- Type
- Regulatory
- Official meaning
- A command sign reserving the road, lane or section ahead exclusively for buses.
What the Buses only sign means
Only buses are allowed to go past this sign or use this lane or road.
What you must do
If you are not driving a bus, do not proceed past this sign or enter this reserved bus lane.
Know the mistake this sign turns on
Full access adds the confusion Buses only 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 R121 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.