Roads and Maritime Services (formerly Roads and Traffic Authority) has commenced planning and building for the progressive upgrade of major arterial roads for south western Sydney.

There will be significant traffic growth in future years due to increased residential and commercial development in the South West Growth Centre and nearby areas.

• Works have commenced on the upgrade of Camden Valley Way and planning is underway for the upgrade of Bringelly Road and The Northern Road.
• Roads and Maritime Services (formerly Roads and Traffic Authority) has completed the upgrade of Cowpasture Road from a two-lane road to a four-lane divided road with new traffic lights at key intersections.
• Work on the southern end of Cowpasture Road was completed in October 2009. Work on the final section, from North Liverpool Road to the M7, was completed in December 2010.
• Roads and Maritime Services (formerly Roads and Traffic Authority) is continuing to upgrade Hoxton Park Road from a two-lane road to a four-lane divided road between Cowpasture Road and Banks Road. 
• The F5 Freeway from Brooks Road to Narellan Road is a $138 million project.  It involves widening the F5 Freeway from four to eight lanes between Brooks Road and Raby Road and from four to six lanes between Raby Road and Narellan Road.
• The F5 upgrade will improve travel times and safety for local and long-distance traffic, improve traffic flow and alleviate congestion.  This project is being delivered in stages to minimise disruption to traffic during construction.