Südbrücke Koblenz, Road and girder bridge in Koblenz, Germany.

The Südbrücke Koblenz is a girder bridge carrying a road across the Rhine, its flat deck edged by a pale metal railing and supported by a light green steel girder structure with angled supports. This green superstructure rests on a tall rectangular pier of light brown stone blocks. The bridge connects Bundesstraße 327 on the left bank with routes B49 and B42 on the right bank.

Construction began in 1969 and the bridge opened on June 20, 1975, after facing significant challenges during the building process. It was part of a major infrastructure program to improve the city's traffic connections.

When the bridge opened on 20 June 1975, a plaque was unveiled bearing the names of the construction workers who lost their lives. It commemorates the 13 men killed in the 1971 collapse and the six who died in 1972.

The Südbrücke carries the southern bypass (B 327 on the left bank, B 49 and B 42 on the right bank) across the Rhine at kilometre 588, the first bridge downstream of the Schiersteiner Brücke. It has no crossings at grade: the ramps link directly to the B 9 and Mainzer Straße near Oberwerth and to the B 42 and Emser Straße at Horchheim. The two river piers stand in line with those of the parallel Horchheimer railway bridge, 36 metres away.

The bridge experienced two fatal construction accidents in 1971 and 1972 that claimed worker lives. These incidents made it a sobering reminder of the hazards faced by builders during that era.