A car-sharing membership is a great resource for people who occasionally need a car but don't want the expense and/or trouble of car ownership. When used in conjunction with public transportation, walking or bicycling, car-sharing can reduce or eliminate the need to own a personal vehicle. For families, car-sharing can postpone or eliminate the need to buy a second car. For businesses, participation in a car-sharing program can reduce or eliminate the need to store and maintain company cars, or to require employees to bring their personal cars to work. Two companies offer car-sharing in Arlington: Zipcar and car2go.