The Bassac River is a distributary of the Tonle Sap and Mekong River. The river starts in Phnom Penh and flows southerly, crossing the border into Vietnam. The Bassac River is an important transportation corridor between Cambodia and Vietnam, with barges and other crafts plying the waters. The Monivong Bridge span the Bassac. The Bridge is a heavily trafficked bridge in Phnom Penh, Cambodia. On the western shore lies the Chhba Ampeou Market.