Surveys of people’s mobility revealed that the automobile accounts for the large majority of commuting trips in the United States, while public transit only accounted for 5% of commuting trips, which can be perceived as marginal. The modal distribution of commuting in the United States is showing remarkable stability with no significant changes in a period of about 25 years. The most significant change is within the usage of the automobile as carpool which has experienced a slight decline to the advantage of driving alone. This obviously reflects higher levels of car ownership. However, recent trends indicate a slight decline in car usage and the growth of public transit and working from home.