国道215线经过柴达木盆地盐湖区地的33公里,因为它的路基、路面全部为盐盖铺筑而成,即所谓的“万丈盐桥”。路面平坦光洁,略有裂缝纹迹,外观颇似黑色路面,适应汽车快速行驶。盐路缺点是怕水,稍有微雨,路面潮湿,行车打滑。如果雨水大干2mm,路面有裂纹处盐晶体溶失形成坑槽,路面强度下降,有车辙;如果雨水大些,路面潮湿泥泞,难于行车,行车造成路面严重破坏。 National Highway 215 through the Qaidam Basin, Salt Lake District, 33 kilometers, because of its roadbed, pavement all covered with salt cover, the so-called “Rare Salt Bridge ”. Smooth and smooth road surface, a slight crack lines, looks like a black pavement, to adapt to the rapid car. Salt road is afraid of water shortcomings, slightly light rain, wet road, driving slipping. If the rain is 2mm thick, the cracked salt crystals on the pavement will dissolve away to form a pit, the road surface will drop in strength and there will be a rut. If the rain is too large, the road will be wet and muddy, making it difficult to drive and seriously damaging the road surface.