The Martin Bridge is a steel truss bridge of eleven spans, each 37.1 metres (122 ft) long, on concrete supports, with three steel girder approach spans each 12.2 metres (40 ft) long. The total bridge length is 463 metres (1,519 ft). Originally it had a lifting span with two concrete counterbalances. The bridge is named in honour of Lewis Martin, the Member for Oxley and the Minister for Works and Local Government at the time of construction.