Sydney Bypass
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[edit] Bypass within the Sydney Basin
There have been various forms of Sydney Bypass for decades.
Some have taken the form of local suburban roads which have gradually become more and more congested until they were no longer effective as a bypass.
Others have been proposals that never eventuated.
When freeways were first built in the Sydney region, they were all designed to radiate from the city's CBD.
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 Sydney-Newcastle Freeway to the Hume Highway 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 Sydney-Newcastle Freeway. 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 Sydney-Newcastle Freeway to terminate at Pennant Hills Road.
In recent years, the Federal Government proposed that the M7 would form part of a bypass route, with a new road branching off the Sydney-Newcastle Freeway near Mount White and crossing the Hawkesbury River with a new high-level bridge to join the M7 at its distinct northwestern corner. Hence, the road would avoid the steep grades of the Mt White section of the Sydney-Newcastle Freeway immediately north of the existing low-level bridges across the Hawkesbury River and would be a quite direct bypass of Sydney that would be separated from much of Sydney's Commuter traffic.
A study was undertaken into options for connecting the Sydney-Newcastle Freeway with the M7. At the preliminary stage of that study, the Roads and Traffic Authority decided that the primary goal of the new road was the best possible relief of traffic on the existing route, Pennant Hills Road. Corridors for that proposal were broadly defined as types A, B and C.
- Type A options were essentially from the existing end of the Sydney-Newcastle Freeway to somewhere on the M2.
- Type B corridors branched off the Sydney-Newcastle Freeway in the vicinity of Berowra and crossed the environmentally sensitive Galston Gorge.
- Type C corridors were along the general lines of the Federal Government proposal.
Because of the criteria of best possible of reduction in traffic on Pennant Hills Road, the best solution was one that would have the most effect on commuter traffic rather than traffic bypassing Sydney. As such, type B and C options were rejected early in the planning process.
Four type A options were identified. All involved extensive tunnelling. One of these, following along underneath Pennant Hills Road, was selected as the preferred option.
Construction is yet to commence on this route.
The background documents to the route study indicate that it is predicted that the Sydney-Newcastle Freeway will need to be upgraded to 3 lanes each way plus climbing lanes up the hills and will still run out of capacity by 2021, at which time a type C corridor will be needed in addition to the type A tunnel currently proposed.
[edit] Bypass outside the Sydney Basin
There is a proposal to create an external bypass of Sydney, (see external links, below). The route would use a series of existing roads (some of which would require upgrading) from the New England Highway at Muswellbrook to the Hume Highway near Goulburn and near Mittagong. The distance from New England Highway to the Hume Highway would be similar to the distance through Sydney. The proposal would also provide improved connections to the regional road hub of Bathurst, making it possible to travel from the Hunter Valley, Southern Tablelands or Illawarra regions to the Central West without having to travel through the Sydney Basin.
The proposed route would use part of the Golden Highway, the Bylong Valley Way, a short section of the Castlereagh Highway near Ilford, the Bathurst-Ilford Road, a short section of the Great Western Highway in Kelso, O'Connell Road, the Goulburn-Oberon Road and Wombeyan Caves Road.
It is not yet known whether the proposal will proceed.
[edit] External links
- F3 to Sydney Orbital route study
- Dural meeting 31 July 2002 - Note traffic predictions on page 5
- Sydney Bypass Proposal
[edit] See also
| Major road infrastructure in Sydney | |
|---|---|
| Motorways | Cross City Motorway | Eastern Distributor | Lane Cove Tunnel | M2 Hills Motorway | M4 Western Motorway | M5 South Western Motorway | Westlink M7 |
| Freeways | Southen Cross Drive | Southern Freeway | Sydney-Newcastle Freeway | Warringah Freeway | Gore Hill Freeway |
| Metroads | Metroad 1 | Metroad 2 | Metroad 3 | Metroad 4 | Metroad 5 | Metroad 6 | Metroad 7 | Metroad 9 | Metroad 10 |
| Bridges & Tunnels | Sydney Harbour Bridge | Sydney Harbour Tunnel | Anzac Bridge | Gladesville Bridge | Fig Tree Bridge | Tarban Creek Bridge |
| Conceptual Plans | Sydney Orbital Motorway | Sydney Bypasses (past, present and proposed) |
| Categories | Category: Streets in Sydney | Category: Sydney highways |
| Other | M4 East (proposed) | Marrickville Tunnel (proposed) | North Western Expressway (abandoned) |
| Operators | Roads and Traffic Authority of New South Wales | Connector Motorways | State Wide Roads | Transurban | [edit] |
