Personal transit is about selecting among alternative modes considering the impact on the environment and the necessity of travel.  Alternative modes of transportation include: walking, biking, mass public transit (i.e., bus, trolley car, light rail), car sharing (i.e., Zip car), car pooling, eco friendly vehicles (i.e., Volt), efficient use of existing vehicles (i.e., proper maintenance and operation), and responsible air travel.  Ways of thinking about the necessity of travel include: secondary benefits (i.e., exercise), shared trips, and route mapping.