Abstract
The concept of car sharing is introduced as an innovative approach to the growing transportation problems of the major metropolitan areas of the United States. After the history of car sharing in Europe and North America is outlined, three studies of the early adopters of Car Sharing Portland (CSP), the first commercial car‐sharing organization in the United States, are reported. Study 1 found that these individuals were primarily motivated to join CSP because of their occasional need for a vehicle, and secondarily because of the financial savings they expected to realize by becoming members. Study 2 found that the two most important predictors of CSP trip usage were distance to the nearest vehicle station and length of membership, and that both factors had more influence on vehicle owners than on nonowners. Study 3 found that although members did not drive fewer vehicle miles after they joined CSP, 26% sold their personal vehicles and 53% were able to avoid an intended purchase. In addition, a majority of members reported increasing use of public transit, walking, and cycling. The results are discussed in terms of the potential environmental consequences of car sharing and the effects of the car‐sharing experience on mobility behavior.