With the sytem, called Personalised Public Transport (PPT), each driverless bus would accommodate a maximum of 24 people but for an extra fee could also be ordered for exclusive use. The vehicles would cruise the streets like cabs but would be summoned by a mobile phone message.
The buses would follow magnetic markers in the road and would avoid other vehicles and pedestrians by using obstacle detection and collision avoidance systems. The electrically propelled vehicles would operate at a maximum of 25mph on residential streets but accelerate to 45mph on special lanes along major roads.
(via we make money not art)