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In 2007, the first prototype Vectus 'Personal Rapid Transport' (PRT) vehicles were demonstrated at a bespoke test track in Uppsala, Sweden. They were designed by TDI working in conjunction with WGH Engineering who developed the track infrastructure. The Vectus concept is based on fully automated (driverless) vehicles intelligently navigating a network of interconnecting tracks . Off-line stations, on-demand operation, point-to-point travel and 'taxi' style comfort and convenience are all features of the system. The use of smaller vehicles allows for less expensive infrastructure, which is also elevated to reduce ground take and obviate the need to relocate existing in-ground services.
Despite their relatively small scale, Vectus vehicles offer high transport capacity because they can run with short headways, typically 3 seconds. System capacity can be optimised through the provision of different vehicle sizes ranging from six passenger (typical PRT style) to sixty passenger (Group Rapid Transit style), potentially all operating within the same network. In operation, Vectus can typically halve the travel time for passengers, compared to bus and light rail services with similar line capacity, at a lower operating cost.