From: http://en.wikipedia.org/wiki/Sandridge_Bridge

The Sandridge Bridge is a historic former railway bridge over the Yarra River in Melbourne, Victoria, Australia, which has been redeveloped in 2006 as a new pedestrian and cycle path featuring public art. It is the third bridge on the site and is listed on the Victorian Heritage Register. In 2001 the State Government held an expressions of interest process for refurbishment of the bridge, seeking commercial ventures, but the process was not successful and in 2003 Melbourne City Council and the Department of Sustainability and Environment took over.[6][7] They committed $15.5 million to restore the bridge, create a plaza on the Southbank side and make connections to walkways on the Yarra north bank.

In 2005 it was announced that artist Nadim Karam had been commissioned to create ten abstract sculptures in a piece titled The Travellers, which represents the different types of immigrants who traditionally arrived by train over the bridge from Station Pier. Nine of the sculptures move across the bridge in a 15-minute sequence, moving on bogies running between the two bridge spans.