The issue with conclusions of reports like these is that yes, Uber/Lyft contributed to a congestion increase, but what would that increase have looked like without Uber/Lyft? How much would congestion have increased by without Uber/Lyft (due to the strong economy, jobs, etc)?

Would people instead have purchased cars and driven them around instead? Would we actually have had higher congestion?

Publishing reports like these without controlling for the economy/jobs/popularity of these cities seems to me to be an unfair attack on Uber/Lyft, where the real culprit might just be a strong economy.