At least we know now why it was built and to be built so high,
http://www.theaustralian.com.au/nationa ... 6585441751
It received a $500m federal Nation Building grant and is the single biggest road investment in South Australia's history. Sources say the height of the South Road Superway was based on forecast demand from the now-shelved $27 billion Olympic Dam mine expansion requiring double-stacked trains.
No Olympic Dam and did it need to be so high ?
The South Australian Freight Council, which supported the massive investment, said the future freight plan for the northern connecter would divert the rail line north of the overpass.
"The longer-term plan is that the track is not required (to go under the superway)," SA Freight Council chief executive Neil Murphy said.
"There is a distinct possibility that it will not ever need to take a double-stacked train underneath it."
Putting the recent discussion into context, the implications for the Northern Connector are telling.
The Superway project, which was visited by federal Transport Minister Anthony Albanese last week, comprises more than 3000 segments cast from 41,000 truckloads of cement. It is designed to form part of a longer north-south corridor, but the state government said last week it had no funds for the remaining construction work.
The Northern Connector project I imagine would have also been based on the Olympic Dam expansion.
Poor initial planning of the Northern Connector itself has clearly cost SA dearly in terms of the cost of the Superway. This, in conjunction with the loss of the Oylmpic Dam expansion clearly puts a big question mark over the Northern Connector project. To make matters worse for SA, The WA government it putting in its own bid for federal funding as part of its own Northern Connector project as part of its election campaign.
http://au.news.yahoo.com/thewest/full-c ... or-bypass/
The Northern Connector Road engineers might be reduced to sharpening their pencils for a simple widening of the Sailsbury Highway to 6 lanes.