Marrickville Tunnel

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The Marrickville Tunnel is a possible underground road tunnel that would link Sydney Airport to an undetermined location on Parramatta Road. Two possibilities mentioned in the media have been a link to Lewisham, whilst others mention a possible connection to the end of the Metroad 4 motorway at Strathfield.

The rationale for such a road is that Sydney is rapidly approaching a complete ring road, with the section of Parramatta Road between the Anzac Bridge and Strathfield being the last and only non-motorway section of a complete Sydney Orbital Network. A tunnel may help to remove trucks transporting goods to and from the airport and Botany Bay from non-motorway roads, and could potentially reduce "rat-running" (whereby commuters opt to drive to and from work using suburban back-roads instead of main roads, because the main roads are too overcrowded and slow at peak hour).

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