Road lines are frameworks of roads. The standards of road lines can have a direct effect on the layout and design the construction objects, and on damage to the environment and the construction cost. Although there are explicit regulations on the technical standards stating how to choose lines indication,lines choice involves manyfactors. So the road lines design requires fully mastering the lines indication, dealing with the relations between roads construction and environment protection and the conflict between the land for roads construction and removing from the land well besides ensuring the functions of road lines.
