A sign that gives orders
Stop
The STOP sign is the only octagonal (eight-sided) sign on UK roads, and it means one thing: come to a complete stop, every time.
01
What it means
A STOP sign always comes with a solid white line across the road. You must bring the car to a complete standstill behind that line, wheels stopped, even if you can see the road is clear, then wait for a safe gap before moving off (Highway Code Rule 171).
It is used instead of give way where visibility is poor or the junction is dangerous, so the rule is stricter: stopping is not optional. The octagon shape is deliberate, so you can recognise it even if it is dirty, snow-covered or partly hidden.
02
Where you'll see it
Junctions with restricted visibility where simply giving way would not be safe, some level crossings, and certain works or school-crossing situations. They are far less common than give way signs, which is exactly why drivers slip up at them.
03
On your driving test
The classic fault is the 'rolling stop' - creeping up to the line and easing out without the wheels ever fully stopping. At a STOP sign that is a fault even if the road is empty. Stopping past the line, or stopping and then pulling out without giving way, also cost marks.
Treat it simply: stop completely behind the line, pause a beat, look properly both ways, then go when it is safe.
Often confused with
Quick answers
Do you have to stop at a stop sign if the road is clear?
Yes. Unlike give way, a STOP sign means you must come to a complete stop every time, even if you can see nothing is coming. Not stopping fully is a driving-test fault and against the Highway Code (Rule 171).
Why is the stop sign an octagon?
So you can recognise it by shape alone, even if it is covered in snow, dirt or partly obscured. It is the only eight-sided sign on UK roads.
Where exactly do you stop?
Behind the solid white line painted across the road. Stop there first, then edge forward only if you need a better view before pulling out.
Sign artwork is Crown copyright, reproduced under the Open Government Licence v3.0; meanings from the Highway Code (gov.uk).
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