Milestones have different colours, did you ever think why is it so? Of course, it is not to provide different shades or make the milestones look beautiful. The different colours used for the milestones are actually colour codes. These colour codes reflect the kind of road and highway you are travelling on.
1. Yellow Colour
2. Green Colour
3. Black, Blue and White Colour
4. Orange Colour
Orange colour milestones are used in villages. These milestones are found on village roads that come under Pradhan Mantri Gram Sadak Yojana