Cheaper than the current works at Darlington, and practically will have better effects. There is a large number of busses and high number of cars that transit any means possible from these locations to the city. Peak hour transit from these regions into the CBD takes about an hour no matter hour you do it, a train service could cut this significantly. Those that take the train will save 20 or so minutes, and the large number of vehicles removed from South Road will significantly improve flow during peak hours.
Meanwhile the $680 million at Darlington will solve the problem at darlington, and improve transit times to the city by approximately 3 minutes. Pity that the problem is edwardstown. The traffic jam starts at Ayliffs Road and continues to Anzac Highway. Its bumper to bumper, stop start. Ayliffs road itself is no better. Anyone who transits South Road has spent plenty of time staring at Castle Plaza, because you are stuck there for long enough.
Im pretty confident, the Darlington Upgrade wont make a lick of difference to transit times for anyone transitting South Road. Where running the train up the hill, will.
You must be making a nice early start to get ahead of the peak if you are getting past the Ayliffes Road junction before running up the smeg of the Edwardstown tailback! Most mornings I'm in that area I see it starting at Bedford Park, on bad days the queue is even piling up on the bottom section of the SExy itself.
Every planner in every first world country would have predicted that the SExy duplication would have this effect of inducing extra road usage instead of reducing it. All because the ALP needs to subsidise a loss-making local car industry building massive yank tanks that nobody wants to buy. Oops, I mean localised versions of
massive yank tanks that nobody wants to buy.
Hopefully the end of the local car industry in 2017 will mean the end of these ridiculous attempts at indirect subsidies, starting with putting the toll on the SExy that should have been applied from day one. Pity it will be too late to prevent this project.
Problem is, not everyone works in the city, especially people in the outer suburbs. So we need to have both, better roads and better rail access.
Take CBD commuters out of their cars and onto more appropriate post-1960s modes of transport and there's more space left for everyone else.
On the other hand, building motorways causes
congestion instead of relieving it. Every other country in the world has already realised this, now it's time for Australia to wake up and move forward into this century instead of insanely trying the same thing over and over again in a futile attempt to build the first motorway ever to result in reduced congestion.
Your statement "Only a couple of destinations have grown up around the old corridor - the Hallett Cove-Sheidow Park area and the short section where the corridor has been reused at Seaford." had better be conveyed to the residents of Reynella, Morphett Vale and Hackham and places in between east of the South Road through these centres. They might disagree.
The low density dormitory suburbs along the former Willunga rail corridor are not journey destinations though, they are journey origins. If you don't live there, there is absolutely no reason to go there - thank goodness! If you don't have any destinations catered for other than the CBD at the end of the line, any new rail line in the area will be just as successful as the first attempt which was almost#
a complete failure.
A new route approaching the Woodcroft-MV area from around the backside of the Vines golf course and crossing the area along the Bains Road east-west axis with a second stage linking from there to a junction near Christie Downs station would provide more opportunities for local usage than recycling the failed corridor.
# almost = mitigated only by it providing an excellent route for the Coast To Vines bikeway. Even the reuse of the Seaford section is not without problems.