What is the meaning of the road sign?

1. Correct answer: Early warning to destinations before an Inter urban junction.
2. Early warning to destinations before a junction in an urban area.
3. Early warning to destination before leaving an Urban area.
4. Early warning to destinations before a motor –way (Freeway).

WhyThis is an inter-urban direction sign placed in advance, before the junction. Urban roads and motorways have different signs.