The Bang Na Expressway (full name: Bang Na – Bang Phli – Bang Pakong Expressway), officially Burapha Withi Expressway (Thai: ทางพิเศษบูรพาวิถี), is a 55-kilometer-long (34 mi) six-lane elevated highway in Thailand. It is a toll road and runs above National Highway route 34, (Bang Na–Trat Highway) owned by the Expressway Authority of Thailand (EXAT). The bridge was the achievement of Sukavich Rangsitpol deputy prime minister of Chuan Leekpai Cabinet (1992–1995). The Bang Na Expressway was designed by the late Louis Berger. The Bang Na Expressway (full name: Bang Na – Bang Phli – Bang Pakong Expressway), officially Burapha Withi Expressway (Thai: ทางพิเศษบูรพาวิถี), is a 55-kilometer-long (34 mi) six-lane elevated highway in Thailand.