The highways of G60( Shanghai-Kunming Expressway),G320( Gui Huang Expressway)and S102( Gui Yan Line),which belong to the sections from Xixiu to Pingba in Anshun of Guizhou province,are taken for the research objects. The vertical distribution of the 6 kinds of heavy metals( Ni,Zn,Cu,Cr,Pb and Cd) of the three highways roadside soil section were analyzed by the Origin software,and their pollution status and potential ecological risk were evaluated by the geoaccumulation index and potential ecological risk in...