The invention discloses an overpass which is formed by overlapping three cross-shaped bridge surfaces, ramps of the three cross-shaped bridge surfaces, and one layer of ground surface. The overpass comprises four through-traffic lanes, four right turning lanes, four left turning lanes, four U-turning lanes, and four
pedestrian passageways, and is composed of a first-layer ground surface, a second-layer bridge surface, a third-layer bridge surface, a fourth-layer bridge surface, and ramps of the surfaces, wherein each of the first-layer ground surface and the second-layer bridge surface is provided with two through-traffic lanes, two U-turning lanes and two
pedestrian passageways, and each of third-layer bridge surface and the fourth-layer bridge surface is provided with two right turning lanes and two left turning lanes. According to the overpass, a method of turning lane
pairing and grouping is used, so that the eight turning lanes are divided into four pairs and two groups, and the eight turning lanes can be reasonable set. By using the overpass disclosed by the invention, a crossroad with
branch lines, or
branch lanes of a multi-line staggered junction can be communicated with the lanes of the overpass in all directions. By adopting the overpass disclosed by the invention, a separation type overpass or an overpass with a two-layer structure can be transformed to the overpass with the structure having the three bridge surfaces and the four
layers. Most of the bridge surfaces of all
layers and the respective ramps are positioned on a roadbed, so that when the overpass disclosed by the invention is built, houses are not required to be removed, and the removal compensate is saved.