(2) Designs: (2. 1) High-Speed Walkways: The system was still in development in 1975 but never went into commercial production. Another attempt at an accelerated walkway in the 1980s was the TRAX (Trottoir Roulant Accéléré), which was developed by Dassault and RATP and whose prototype was installed in the Paris Invalides metro station. The speed at entry and exit was 3 km/h (2 mph), while the maximum speed was 15 km/h (9 mph). It was a technical failure due to its complexity, and was never commercially exploited. In the mid 1990s the Loderway Moving Walkway company patented and licenced a design to a number of larger moving walkway manufacturers. Trial systems were installed at Flinders Street Station in Melbourne and Brisbane Airport Australia. These met with a positive response from the public, but no permanent installations were made. This system is of the belt type, with a sequence of belts moving at different speeds to accelerate and decelerate riders. A sequence of different speed handrails is also used. In 2002, an experimental high-speed walkway was installed in the MontparnasseBienvenüe Métro station in Paris. At first it operated at 12 km/h (7 mph) but due to people losing their balance, the speed was reduced to 9 km/h (6 mph). It has been estimated that commuters using a walkway such as this twice a day would save 15 minutes per week and 10 hours a year. Using the high-speed walkway is like using any other moving walkway, except that for safety there are special procedures to follow when joining or leaving. When this walkway was introduced, staff (seen here in yellow jackets) determined who could and who could not use it