It's also a failure of politics. If you tell people you're going to raise taxes to pay for the road, you're probably not getting elected. Toll roads ideally are just another form of tax that is more sneaky than straight up raising taxes.
People won't stop driving entirely. Some are legitimately afraid of rain, sun, wind, snow, etc . Placing the toll booths every 100m would go a long way to reducing traffic and reducing dangerous vehicle speeds.
So the RTA's own modelling showed the Rozelle Interchange would be a traffic disaster—but generating more toll road trips for Transurban was more important.
"The [NSW Roads and Traffic Authority] finalised the first business case for the WestConnex tunnel project in June 2013, with the help of road designers from around the world.
"[Paul Forward, a former CEO of the RTA] said the initial concept did not include the Rozelle Interchange.
...
"In 2014, an expert review group was formed to assess these plans.
"Mr Forward said it was at this point that TfNSW bureaucrats began to question the connectivity provided by the design.
"The RTA's former director of traffic Chris Ford told the inquiry that 15 alternative designs were modelled.
"Mr Ford said the modelling found that another motorway leading to the Anzac Bridge would cause congestion.
"'The issues that we see today were very clearly established in the modelling in 2014,' he said.
"In November 2015, after Mr Forward and Mr Ford were dismissed, TfNSW updated the WestConnex business case to include the tunnel to the Anzac Bridge, despite the congestion concerns raised by the modelling.
"In 2016, Transport for NSW updated the business case a second time ... creating a tunnel linking the Iron Cove Bridge to the Anzac Bridge."
...
"In 2018, the NSW government sold its 51 per cent stake in the Sydney Motorway Corporation, the body responsible for operating WestConnex, to Transurban for $9 billion.
"Mr Forward said the final design would generate a larger number of toll trips than previous options."
@shermozle@ajsadauskas@fuck_cars
Same here in Stockholm. Now that the 21 km tunneled motorway ringroad is nearing completion they're adding several widenings of connecting motorways etc as separate projects even though even in the planning documents they're explicitly consequences of the big new motorway "bypass".