Whoopsie! Sydneyâs road planners just discovered induced demand is a thing, after opening a new motorway.
For those outside Sydney, the New South Wales state government recently opened a new spaghetti intersection just west of Sydneyâs Central Business District.
It was supposed to solve traffic. Instead, itâs turned into a giant car park:
"For the third straight day, motorists and bus passengers endured bumper-to-bumper traffic on the City West Link and Victoria Road. A trip from Haberfield to the Anzac Bridge on the City West Link averaged an agonising 44 minutes in the morning peak on Wednesday.
"Several months ago, Transport for NSWâs modelling had suggested traffic from the interchange would add only five to 10 minutes to trips on Victoria Road through Drummoyne and over the Iron Cove Bridge during morning peaks.
âThose travel delays have now blown out.â
So what do motorists say when their shiny new road that was supposed to solve traffic instead turns into a massive traffic jam?
âDude! Just one more lane!â
From the article:
"[Roads Minister John] Graham and his Transport boss Josh Murray appear reluctant to do what many motorists reckon is the obvious solution.
âThat is, add lanes or make changes at the pinch-points that are causing the pain. A three-lane to one merge point from Victoria Road onto the Anzac Bridge, along with two lanes merging into one on the City West Link, are proving to be painful bottlenecks.â
#roads #traffic #cars @fuck_cars @sydneytrains @urbanism #urbanism #UrbanPlanning #motorways #fuckcars
@WaxedWookie @AvonVilla
Because itâs the same story we have seen 1000 times all over the world for 70 Years. You have to look at the problem holistically. Simply thinking about cars and roads, in isolation to the whole city, how people behave, how we live and work, is a recipe for failure. I think this explains the issue well enough.
Iâve been clear I think induced demand will be an issue here. Thereâs no dispute on that, but youâre refusing to bite the bullet on whether these more extreme teething issues (which Iâm asserting arenât induced demand) will stay.
If you say the delays will stay, Iâm confident youâll be proven wrong in fairly short order - the traffic will ease, proving itâs not induced demand. The scale of the induceed demand can be fairly measured at that point.
If you donât think the delays will stay when the induction factors remain unchanged, you have to concede this isnât induced demand - itâs short term teething, which is my position.
@WaxedWookie @MrLee Iâm happy to be proven wrong, but I think traffic is likely to remain awful during peak hours on the Anzac Bridge and Victoria Rd. (Itâs likely to ease up temporarily over the Christmas break, but will worsen again after Australia Day.)
Even before WestConnex, the Anzac Bridge already wasnât exactly great during peak hour from all the traffic heading through Drummoyne along Victoria Road.
The new WestConnex motorways have made that worse.
If youâre on the M4 extension, how do you get to the CBD? Either you take the Parramatta Rd turnoff at Ashfield, or you go through the spaghetti intersection to the Anzac Bridge.
If youâre heading from the airport on the new M8, how do you get to the CBD? You go through the spaghetti intersection to the Anzac Bridge.
And if youâre on the M5, how do you get to the CBD? Well, you can take Southern Cross Drive under the airport to the Eastern Distributor, or you take the M8 to the spaghetti intersection to the Anzac Bridge.
During the morning and evening peak, a lot of commuters want to travel to or from the city at the same time. And that traffic is being funnelled from the M4, M5 and M8 on to the Anzac Bridge, and then to the CBD offramps.
The claim was that these new WestConnex motorways were going to take traffic off other roads. So for example the M4 was going to take traffic off Parramatta Road.
What itâs ended up doing is inducing more traffic demand, and that additional demand is being dumped on to the Anzac Bridge.
Parramatta Road is still terrible during peak hour, and thereâs now even more cars travelling along the M4.
People have also made housing and long-term travel decisions based on the claims that WestConnex would make car travel quicker to the CBD from western and southern Sydney.
Are there people driving slowly while they figure out which lane to take through the spaghetti intersection? Yes there are.
But. The bigger issue is that the new WestConnex motorways have induced additional traffic demand, and a lot of it is trying to cross the Anzac Bridge.
Itâs been reported that the travel times are already dropping by 10%+ in the few days since opening⌠That sure points to these delays being mostly due to teething thatâs beginning to ease already.