This warning sign alerts drivers that a side junction enters the main carriageway while the road curves sharply to the left.
Because left-hand bends restrict visibility across the inside kerb, drivers emerging or turning require extra space and time.
What this sign means
It indicates a side road joins the main route directly on a left-hand curve ahead.
- Red warning triangle
- Black curve bending left with a side road line
- Highlights restricted views at corner intersections
What to do when you see it
Reduce your speed before the curve and position your vehicle safely in the lane. Be alert for slow-emerging traffic.
- Brake before entering the bend
- Keep well clear of the inner curve where vehicles emerge
- Scan ahead for indicators from vehicles turning off
How this sign is tested
DVSA theory test questions assess speed management, awareness of blind spots, and proper mirror usage on curves.
Common mistakes
Driving too quickly through the bend, leaving insufficient stopping distance if an emerging vehicle pulls out.
Test yourself on this one
Road and traffic signs is the biggest category in the question bank with 102 questions, and signs turn up inside other categories too. Work through them free, no sign-up needed.
Practise road sign questionsFrequently asked questions
What makes junctions on left bends dangerous?
The curve blocks line-of-sight view for both main road drivers and emerging side-road drivers.
Can I overtake near a junction on a bend?
No, overtaking on or near a junction or bend is extremely dangerous and against Highway Code advice.
What line markings might appear at this hazard?
Solid white central lines or hazard warning lines often reinforce no-overtaking restrictions.