Southern Expressway

The Southern Expressway is the world's longest reversible one way freeway, although the expressway is currently being turned into a regular 2-direction freeway. Originally proposed as 'Noarlunga Freeway', it was built as a corridor to relieve heavy traffic from the major arterial, Main South Road, in Adelaide's south. The expressway was built in two stages — the first completed in late 1997, the second in 2001. The total cost of the arterial was A$76.5m, and it is 21 km in total length. Main South Road provides both the start and finish. There are exits at Marion Road, Panalatinga Road, Sherriffs Road and Beach Road. The Southern Expressway is signed as M2.

Construction of the expressway also included the Adelaide Southern Veloway for cyclists, which runs alongside it for 7 km, from Marion/Main South Road to the Panalatinga Tunnel. South of the Panalatinga Tunnel, the bikeway becomes a shared track for the remaining 12 km of the expressway. The expressway crosses over the Coast to Vines rail trail at both Panalatinga Road and at the expressway's Southern end.

Read more about Southern Expressway:  Duplication, Operation, Signage Criticisms, History, Exits and Intersections, Map, Bridges, Promotional FM Radio Transmitter

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