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（接第２期） ４、部分苜蓿叶形立体交叉口 由于受到地形、用地面积和形状的限制，而不是全部采用全苜蓿叶形立交的所有部位，这种设计称为部分苜蓿叶形立体交叉。 ４．１．基本形式 部分苜蓿叶形立交一般应用于主干道或高速干道与次要干道相交之处。高速干道出人口均为立交，
(Then the second period) 4, part of the cloverleaf three-dimensional Intersection due to the terrain, land area and shape constraints, rather than all the whole clover leaf-shaped interchange of all parts, this design is called partial cloverleaf three-dimensional cross . 4.1. The basic form of part cloverleaf overpasses are generally used at the intersection of trunk roads or highways and secondary roads. Expressway population are overpass,