Road markings
Stop line at a Stop sign
What it means
A thick solid white line across the end of a road, used with the red eight-sided Stop sign. You MUST stop behind the line (Rule 171) every time, even if you can see the road is clear - rolling slowly over it is not stopping. Then wait for a safe gap in the traffic before you move off.
Highway Code Rule 171 — read it on GOV.UK
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Other road markings
Road marking pictures: The Highway Code (Department for Transport and Driver and Vehicle Standards Agency), © Crown copyright. Used under the Open Government Licence v3.0.