Warning signs
Side road ahead (left)
What it means
A minor road joins yours from the left just ahead, and the thicker line shows your road has priority. Watch for a car edging out, a cyclist coming off the side road, or the vehicle in front slowing to turn in. Ease off the gas, keep your gap, and do not overtake past the junction mouth.
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.