 The project also includes roadway improvements to the connection between I-395 and State Road 836, also known as the Dolphin Expressway, at Interstate 95.The tunnel will allow heavy trucks to bypass the congested Downtown Miami area, which is considered to be especially crucial with the large increase in trade traffic expected to be created by the Deep Dredge Project and the enlargement of the Panama Canal.Projected to eventually carry 26,000 vehicles a day under Government Cut through its twin two-lane tunnels, the top of the tunnels lie over 60 feet (18.3 m) below the seabed.