Complex sentence: It is one of the oldest and longest timber and girder bridges in Australia, 2.8km (1.7mi) long, and the longest bridge of its time in the southern hemisphere this bridge originally had two traffic lanes and a pedestrian footpath.
Split into simpler sentences: It is one of the oldest and timber and girder bridges in Australia, and at 2.8km (1.7mi) long is the longest in the country. This bridge originally had two traffic lanes and a pedestrian footpath.