whenever we go on a long journey on the road, or attention often goes to the street along the road, we get to now from them how far our floor has remained along with the name of the place to come, along with the distance between them and many types of marks are there , along with the color of these mile stones is also different. this stone explains the work of a killer for the passengers. you are walking in the right direction of your destination and how far it is mostly, most of the stones are planted on every kilometer but their different color also have special meaning, you will see yellow colored stones, green and black orange, but the stones of each of these colors have different meanings. that is to give some information to the passengers .if you see yellow colored stones on the way, then understand that you are on the national highways now a days, the national highways network in the country 1,65,000 the area spreads in the area, it connects the highways and cities, the central government maintains these highways you may have seen the color of these mile stones in many places if you have a green belt it means that you have reached the national highways and reached the state highway.