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Sydney Bypass refers to a number of roads, existing and proposed, that motorists can use to avoid the congested approaches to the city's central business district (CBD). The main bypasses are: * the Westlink M7 motorway, which allows traffic from Canberra and Melbourne to skirt Sydney's outer suburbs on its way north – this bypass will be completed by the NorthConnex tunnel * the proposed Outer Sydney Orbital * the planned WestConnex (M4–M5 link), second harbour road tunnel and link to the M2. ==History== Some disjointed sections of such planned roads were built but during the 1970s, the focus changed and many sections of these proposed roads were never built. Such disjointed segments of freeway can be seen in such places as Hunters Hill near Gladesville Bridge, where segments of the North West Freeway were constructed. Around this time, freeway planning shifted to building freeways as bypasses. For decades, it has been desired to construct a Freeway standard bypass of Sydney as part of the National Highway, connecting the Pacific Motorway to the Hume Motorway to allow through traffic to be separated from local traffic. The North West Freeway was originally intended to fork in the Lane Cove Valley, with one fork following what is now the M2 corridor and the other following what is now the Pacific Motorway. If these had been built, traffic would have looped at that fork in much the same way as traffic from Burns Bay Road loops around the approach to Gladesville Bridge to turn west on Victoria Road. The Lane Cove section was abandoned for environmental reasons, leaving the then Sydney-Newcastle Freeway (now Pacific Motorway) to terminate at Pennant Hills Road. In the 1960s, the DMR signposted a number of ring roads via existing surface streets. Of these, only the A3 ring-road remains today.〔http://www.ozroads.com.au/NSW/RouteNumbering/Ring%20Roads/ringroads.htm〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sydney Bypass」の詳細全文を読む スポンサード リンク
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