If getting out of your car and interacting with other people is one of the keys to happiness, then Americans are on the wrong track. There are a lot of new ways to commute to work, but an old one still leads them all. “Last year, about 76% of workers 16 years and older drove to work alone — just shy of the all-time peak of 77% in 2005.” In 1980, about 20% of Americans carpooled. Today that number is under 10%. This is supposed to be the age of the sharing economy, but it seems like all we’re sharing is the road.

+ Between driving alone and working from home alone, a lot of people are spending more time by themselves. When does being alone turn to loneliness?