Brahmaputra River branch, which contains the majority of the river's flow, continues due south as the Jamuna () to merge with the lower Ganga, called the Padma River (). The eastern branch, formerly the larger, but now much smaller, is called the lower or old Brahmaputra (). It curves southeast to join the Meghna River near Dhaka. The Padma and Meghna converge near Chandpur and flow out into the Bay of Bengal. This final part of the river is called Meghna. The Brahmaputra enters the plains of Bangladesh after turning south around the Garo Hills below Dhuburi, India. After flowing past Chilmari,
Ganga Expressway infrastructure development department of the Government of Uttar Pradesh, in its 2007 proposal request for Ganga Expressway, explained the motivation for Ganga Expressway. The government claimed every year many parts of the state of Uttar Pradesh face flooding of Ganga on its left bank, resulting in loss of life, usable land and property. To mitigate this problem the state government's irrigation department proposed the construction of a bund (embankment) along the left bank of river Ganga from Narora to UP/Bihar Border (Ghazipur). The state government decided to use this necessary embankment and build an access-controlled eight-lane expressway on top of