Warning signs
Road only wide enough for one line of vehicles
What it means
The "Single track road" plate under a road-narrows sign: there is room for one line of vehicles, not two. You meet it on rural lanes and single-track Highland roads. Get your speed right down, look as far ahead as you can for anything coming, and use the passing places to let others through.
Highway Code Rule 155 — 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.