The paper provides an overview and comparison of so-called “new-generation” personal rapid transit (PRT) technologies. A total of about 40 known PRT concepts existed as of 2007, of which 19 were being “actively developed” (i.e., not dormant, with some testing completed). Of the 19, ten had readily accessible operational specifications, enabling an assessment and comparison. Ten operational parameters were considered for each of the technologies. A throughput of 7,200 passengers per hour is possible with a minimum headway of 1.0 sec, line speed of 35 km/h, and braking rate of 24.5 m/sec2 (i.e., 2.5 Gx). PRT technologies that propose values outside of these limits may not be feasible. Only ULTra and Vectus feature a full slate of either feasible or fundamental (i.e., offering preferable values) operating characteristics. CyberCab and MISTER would be more feasible with decreases in minimum headway and line speed, respectively. The other technologies are either partially feasible, unclear on certain characteristics, or better classified as “high-speed” PRT. The findings may facilitate the formulation of PRT standards and operating criteria. These, along with a successful implementation of PRT at Heathrow Airport, may generate new markets and competitive technologies. Further studies comparing guideway design, materials, switching, visual impacts, costs and financing are needed.
Abstract