Personal Rapid Transit (PRT)
Overview
Personal Rapid Transit is a concept in public transportation where small vehicles that seat only a few people can be boarded by riders and used to take them between two places on a fixed or semi-fixed route.
A PRT system, if built, among other potential uses, could potentially serve an area where shuttle vans or buses serve a in regular traffic.
Technology
Presently, there are no PRT systems in service; several have been proposed and either put on hold or declined. As such, there is no standard or precedent for PRT technologies at this time.
Often, PRT proposals and prototype/test systems have used rubber-wheeled vehicles on a separated right-of-way "guideway" or monorail infrastructure. The infrastructural requirements would be even smaller in footprint than monorails due to the small nature of the vehicles, but would likely require substantial switching facilities if either operating like a monorail or on a double-flanged guide beam.
Power for vehicles would likely be provided via a contact rail, solar panels, or through batteries recharged at set locations such as when vehicles are idle, or a combination thereof.
See Also
Wikipedia: Personal Rapid Transit