[Shawn]

A quick glance at the article's methodology compares total number of hours spent in peak traffic. This was calculated by "combining anonymous, real-time global positioning system probe data from 300 million connected cars and devices with real-time traffic flow data and other criteria, such as construction and road closures."

This explains why you don't see the painfully obvious candidates (Manila, Jakarta, Bangkok, all of which have much worse traffic than any American or Canadian city): connected cars and devices will underrepresent the actual driving population. Not a whole lot of jeepneys driving around Manila with GPS.

Seriously, nothing in the US or Canada comes close to the SE Asian megacities when it comes to vehicle traffic. Not remotely close.