South Bridge is a bridge in Dead Rising 3.
It is one of the main bridges in Los Perdidos and connects South Almuda and Central City. After Chapter 4, a Spec Ops checkpoint is set up on the bridge, so Nick will either have to traverse around the barricade or kill the soldiers guarding the checkpoint.
During the period of time in Chapter 3 when Red leaves to get fuel, the side mission Lesser Evil will occur where Nick can find Big D on the South Bridge.