As mentioned in the linked study I've always had the understanding that increasing road capacity doesn't do anything for congestion because more people start driving. There are many others that come to the a similar conclusion you can see below:
https://www.thecgo.org/research/does-expanding-highway-capac...
https://escholarship.org/uc/item/58x8436d
https://www.researchgate.net/figure/How-Road-Capacity-Expans...
https://www.smartertransport.uk/does-building-more-roads-red...
https://www.wired.com/2014/06/wuwt-traffic-induced-demand/
The real question is who even wants to be driving in a city? It seems like one of the most stressful experiences possible. More places need to build public transport infrastructure that actually works rather than building even more roads...
