My first thought is that this guy has not lived in a populated city during rush hour. Growing up in Houston, its a part of life. As soon as school is out, traffic is reduced by at least 1/3-1/2 on major freeways according to my built in road rage o meter. In suburban hubs, traffic is reduced in the evenings as well but that is more static throughout the year. Just recently during spring break my commute halved in terms of minutes in the car. I see other problems with his "study" as well, since it was a state of emergency, other people stayed home as well since they anticipated terrible weather, so as a datapoint its not very useful.