India and Bangladesh have a protocol on Transit and Trade through inland waterways to use specific routes for commerce between the two countries and for the passage of goods. The existing protocol routes are 1) Kolkata-Pandu-Kolkata, 2)  Kolkata-Karimganj – Kolkata, 3)  Rajshahi-Dhulian-Rajshahi, 4)  Pandu-Karimganj-Pandu.