History
The original western Sydney Bypass was Ring Road 5, whose busiest section (Pennant Hills Road and Woodville Rd) is between Pacific Highway and Hume Highway with Parramatta in between. In 1974, Ring Road 5 was superseded by State Route 55. The growth of Sydney's west had instead turned it into a primary arterial with huge increase in freight traffic.
In 1994, Cumberland Highway was upgraded and replaced Woodville Rd for the Liverpool-Parramatta stretch. Pennant Hills Rd was widened and retained for the Parramatta–Wahroonga stretch. This Liverpool–Wahroonga route was initially State Route 77(proclaimed in August 1988), later signed as Metroad 7 in June 1993 and was designated by the Federal Government as an interim National Highway in 1994 until the completion of Westlink M7. From the introduction of Metroads in Sydney, Metroad 7 went along Heathcote Road to Metroad 1 at Heathcote. A southern section of Heathcote Road has now been replaced by Metroad 6.
The Westlink M7 motorway was completed in December 2005, and now connects the M5 from the south-west, the M4, and the M2 to the north-west.
Read more about this topic: Metroad 7
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