The utility model discloses a frog liang tian way, include non -motor way, car lane, support frame, central separator, hang single track, overhead bridge, middle isolated column, runway and emergency rescue passageway, the bottom of support frame is the normal carriage way in ground, is equipped with central separator, both sides from the close -by examples to those far off respectively the symmetry be equipped with car lane and non -motor way, the top of support frame is fixed and is equipped with overhead bridge, the bottom of overhead bridge is equipped with two and hangs the single track, the top of overhead bridge surface is overhead through street, and the centre is equipped with the isolated column, by the centre to both sides respectively the symmetry be equipped with runway and emergency rescue passageway, it can set up center or both sides at the support frame to hang the single track, can combine to set up the overline bridge or the street function was realized to the underpass passageway at the station within range in the support frame both sides. The utility model discloses can reach effectively utilize the underbridge space, practice thrift urban land, energy -concerving and environment -protective, the construction is convenient, solve the beneficial effect that the city blocked up.