The side road ahead on the left sign features a thick main line with a smaller horizontal branch sticking out to the left.
It warns main-road traffic to expect vehicles joining, turning left into, or emerging from a left-hand side road.
What this sign means
This sign alerts you to a side road junction situated on the left side of the main road ahead.
- Red triangle warning symbol
- Thick main arrow with left branch
- Warns of vehicles entering or exiting from the left
What to do when you see it
Check your rear-view mirrors and monitor the left side junction as you approach. Look out for vehicles pulling out or pedestrian activity.
- Scan left junction early for emerging cars
- Be aware of vehicles in front slowing down to turn left
- Maintain appropriate lane position
How this sign is tested
Questions test your awareness of junction priority rules and proper mirror usage before speed adjustments.
Common mistakes
Failing to anticipate vehicles ahead braking suddenly to make a sharp left turn.
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
Does main road traffic have priority over the side road?
Yes, traffic on the main road has priority over vehicles emerging from the side road.
Should I indicate when passing a side road on the main road?
No, only indicate if you plan to turn into the side road.
Why is scanning early important at side roads?
Early scanning gives you time to react if emerging drivers fail to see you.