All trips are non-stop to preselected destinations. The path or guideway is three feet wide or less. The upper limit on speed is as high as current jet travel. The vehicles can be as small as a shoe box. The guideways can be constructed in three dimensions.
Power source is electric.
Noting the different nature of PRT, the next step is to realize the possibilities of PRT, again thinking relative to the automobile. With no human driver safety will take a quantum leap. Insurance costs will plummet. Speed of people travel in urban areas will rise three fold or more, and intercity travel speeds by a factor of at least five. Travel paths can be built in completely new places and patterns.