#Galway Ring Road: I’ve now read through the updated Traffic Modelling Report submitted by @GalwayCoCo
to ABP. And I’m more convinced than ever that this project cannot be justified in its current form.🧵
to ABP. And I’m more convinced than ever that this project cannot be justified in its current form.🧵
Comments
Supporters argue: “2% is fine, because it diverts traffic around the city centre.”
But it doesn’t account for new trips created by the extra road capacity.
That’s induced demand, and it’s missing from the ring road report..
"Generated Traffic and Induced Travel" a meta research paper by Todd Litman presents findings from a multitude of sources. One source as follows:
"A 20 % increase in travel speeds will induce a 10 % increase in traffic volumes in the short term and a 20 % increase in the long term."
GRR predicts network speed increase from 19->27 kph short term. ⬆️42%
And 16->23 long term. ⬆️44%
The numbers above would suggest that should be closer to 40%.