There are three major urban transportation concepts that are being investigated around the world today. One is called Personal Rapid Transit , a second is called Group Rapid Transit and the third is called Dualmode Transportation . The PRT concept calls for small automated vehicles that are operated on elevated, exclusive guideways. A large number of stations would be provided so that patrons could access the system with a short walk and then have a non-stop, stressless and view-rich ride to the station nearest their desired destination. The PRT system would be available all of the time, would be electrically-powered and essentially pollution and noise free. The vehicles would be captive to the system and owned by the system operator, which could be a public agency, a private company or some mix of the two. The service provided would approximate that of a private auto in terms of travel time and surpass it in terms of safety, reduced stress and adverse environmental impacts. It is a good candidate for the auto-competitive transit label.
Group rapid transitis a term that refers to a system very much like PRT, except that the vehicles are larger as are the guideways and stations. Some have off-line stations which makes non-stop service possible but some do not, requiring a stop at each station. GRT systems are likely to be more expensive than PRT systems because of larger vehicles, guideways and stations but may provide more capacity, in some applications. A GRT system has been successfully operated at West Virginia University in Morgantown for more than 25 years.
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