The bridge is of an asymmetrical design, with a single pylon located on the Thonburi bank of the river. The pylon, which is tall, is in the shape of an upside-down Y standing on two legs. The bridge deck passes through the legs of the pylon, carrying two carriageways of two lanes each, as well as shared pedestrian and cycle ways on both sides. Fifty-six cables, arranged in two planes in a semi-fan configuration, support the -long main span, while another twenty-eight cables arranged in a single plane with a near-harp configuration connect the tower to the median of the anchor span. Most of the bridge, which is in length, is constructed of reinforced and prestressed concrete, except for the main span, which has a steel structure with a composite concrete deck. At its completion, the bridge was one of the world's largest asymmetric cable-stayed bridges.