My bad. I didn't mean for this to sound like it was a topic of discussion. It was a summary of peer-reviewed literature on the topic. Narrower roads rarely lead to more crashes and generally reduce speed and crashes, especially in urban areas with very few caveats (one being shared road with bicycles): - mdpi.com/2071-1050/17/2/628 - journals.sagepub.com/doi/10.3141/2023-08 - nacto.org/wp-content/uploads/Part-III-Section-1-Citation-2_-Hamidi-and-Ewing.pdf Increasing the number of lanes unambiguously increase traffic: - sciencedirect.com/science/article/abs/pii/S1361920901000098 - aeaweb.org/articles?id=10.1257%2Faer.101.6.2616 Reducing the number of lanes reduces crashes and keeps traffic at worst little more congested than before (i.e., overall reduced), just with fewer lanes: - journals.sagepub.com/doi/abs/10.3141/1784-11?download=true - pedbikeinfo.org/downloads/WhitePaper_RoadDiets_PBIC.pdf Which part of the assumptions or methods used do you disagree with?