Warning signs
Side road ahead (right)
What it means
A minor road joins yours from the right just ahead. The thicker line is your road, so you keep priority, but the real danger is someone nosing out or the car in front braking to turn in. Ease off, check your mirror, and hold back instead of overtaking anywhere near the junction.
Highway Code Rule 146 — read it on GOV.UK
More on signs like this: Warning road signs explained: junctions, bends, narrowing roads and hazards
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Sign images: Department for Transport, © Crown copyright. Used under the Open Government Licence v3.0.