The study is obvously flawed
I live in Melbourne, and yes, the traffic can get bad, but nothing like Sydney, Manila, Bangkok, Shenzhen, Auckland and Seoul - all cities that have exereinces really bad traffic - worse than my wort ever traffic jam in Melboune. Locals in all of those cities confirmed that the bad traffic was normal. This tells me that study must have been flawed in it's method and therefore invalid as the basis for the article apart from general lessons that all big cities have traffic problems to some extend ot another...