I think it's enough data to form an interesting hypothesis, but a lot more data would be needed to support that claim. I've often noticed that my commute is mu

I think it's enough data to form an interesting hypothesis, but a lot more data would be needed to support that claim. I've often noticed that my commute is much faster on days without school in Chicago, especially my commute home. I think an equally plausible explanation is that people without kids plan necessarily plan their entire schedule around them. For instance, if there is a school inservice, is traffic better because people aren't taking their kids to school, or is traffic better because people stay home with their children? Another thing is that school holidays tend to be local government holidays as well. The local government is one of the largest employers in almost any jurisdiction. If the kids aren't in school because of a holiday or a severe weather event, there's a pretty good chance employees of the local government are not going in to work, not to mention the fact that the school staff probably are probably also not going to work. The research wouldn't be that hard once you had some data, but of course, gathering data is the hardest part of most research.