Two years into the introduction of carsharing in San Francisco, nearly 30 percent
of members have gotten rid of one more cars and two-thirds stated they opted not
to purchase another car. By City CarShare's second anniversary, 6.5 percent of members'
trips and 10 percent of their vehicle miles traveled were in carshare vehicles. Matched-pair
comparisons with a statistic control group suggest that, over time, members have
reduced their total vehicular travel. Because carshare vehicles tendet to be small
and fuel-efficient, per capita gasoline consumption and greenhouse gas emissions
among members also appeared to go down. Suppressed travel likely reflected a combination
of influences: reduced car ownership, more judicious and selective use of cars for
particular trip purpose, and carpooling among trips made using car-share vehicles.
Carsharing, however, has also enhanced mobility, allowing members to conveniently
reach more destinations in and around San Francisco and to do so more quickly. Because
it widens mobility choices and offers a resourceful form of automobility, carsharing
is a welcome addition to the urban transportation sector in cities like San Francisco.