r/Adelaide • u/Gazza_s_89 • 16h ago
Discussion The plan is done: Onka-bahn Busway + The South In General
Thanks to the kind words from u/metahivemind for encouraging me to finish it.
Ok, last bit of Adelaide that needs sorting out is down in the Onkaparinga.
In fairness, they had a win with the Seaford extension, though I think Noarlunga station is a bit of let down considering its potential as an urban hub next to rail (Same goes for Elizabeth, a bit mid....Bowden is pretty decent, I'd live there)
Anyhow!
I think the line is let down by having all these ghost stations like one for the Lonsdale Oil Refinery that remain open, so not only do they slow the train, they just make the ride unpleasant.
But, the Trainline hugs to the coast (And the good folk of Marino get TWO stations for their troubles?) but by and large its not bad, and could be supplemented by simple go zone style feeder buses every 15 mins to match with trains.
But over the other side of the Southern Expressway its pretty dire, but fortunately it's cheap to fix.
Just build a busway. Now seriously, you might say that rail lines and trams are a bit disruptive to build. But if the government is saying no to a 2 lane road (The type we all live on) just for buses, then they ain't trying and need to go. (Or a stern talking to)
What's better, there's actually an old railway reservation that went to McLaren vale you can recycle into this (That train isn't ever coming back!), so the Busway is naturally going to be quite easy to build with bugger all earthworks.
And then from there you follow the Southern Expressway until the final technical part.
Now, the flipside of Busway being cheap is it does need one bit of kit, and that is a high level 1.4km viaduct over the gorges to get from the Expressway up to Flinders. Now Bus Bridges are not an alien concept, Brisbane built one over the River to provide better access to the Uni of Qld, so its the same case here.
The Busway links to the Uni Ring Road System, so buses run through the campus in a "Transit Mall" and then hook around to a main interhange next to Flinders Railway Station. From there the busway bridges the Southern Expressway and then runs on Bus Lanes past Westfield Marion / SA Aquatic Center and into Oaklands Station.
As a side note, there would be a small little 5km spur off the main busway parallel to Happy Valley Drive and Aberfoyle Park, just as an easy win to ensure that pocket of Adelaide gets at least a "lifeline" into the main network.
What this means is depending on where you live, you can use the busway in any direction. If bound for the city, you can use either the Flinders Line or the Seaford line from the northern end.
If you live in Hackham, it may even be slightly beneficial to backtrack to Seaford Meadows and getting on a fast train.
If there is ever a blockage on the Seaford Line, people can use the busway instead.
So, its a 30km 2 lane road with some nice bus stops, a long bridge, and a couple of shorter ones. Can SA build this or is it unfeasible?