What is the meaning of the following traffic sign?

- Level crossing 300 meters ahead.
- Guardrail marking.
- Railway barrier ahead at a work-site
- Direction and warning posts at the side of the road.· Correct answer

Sign 148 shows guidance and warning posts at the side of the road. The posts mark the road's boundaries and help drivers see the edge of the road, especially at night or in poor visibility conditions.
Diagonal red-and-white stripes = guidance posts at the side of the road
Confusion with railway crossing signs
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