Cities21 - SF to SJ via hub - system concept

With traditional carpools, members are selected and then the carpool proceeds most weekdays for months without change. With dynamic ridesharing (DRS), one-time carpools are arranged within 3 days of the trip. With new GPS cellphone technology (Apple iPhone & Google Android T-Mobile phones), "instant ridesharing" (IRS) is enabled, where one-time rides are arranged within minutes of the start of the trip. With IRS, a person may carpool every day, but with the flexibility of a different departure time and group of people each day. IRS can handle schedule variations in a manner that makes transportation routine and hassle-free. IRS works best when back-up public transportation is available.