The Nancy Guided Light Transit or TVR is a guided bus system in Nancy, FranceThe tram on tires technology, TVR, which approximates what we would call today for top-level bus service, has become famous for having known a number of setbacks early in its history, because of an overly quick startup in 2000: insufficient testing and debugging problems of rolling stock reliability and ergonomics of the cockpit. Finally, the final commissioning was delayed a year because of these disappointments.