瑞士铁路 2 0 0 2年以前将实行一项广泛的客运机车车辆改造计划。为此 ,预计需要购置新车及改造现有客车。其中 ,拟在铁路工厂更新改造约 4 50辆 Mark IY型客车。装有空调系统、预计速度达 2 0 0 km/ h的新型双层城间客车将进入国家铁路。此种客车的总数计划将达到 2 50辆瑞士 Swiss Rail will implement a wide range of passenger rolling stock retrofit plans by 2002. For this reason, it is estimated that new cars need to be purchased and existing buses transformed. Among them, about 450 Mark IY buses are planned to be renovated in the railway factory. New double-decker intercity buses with air-conditioning systems and estimated speeds of up to 200 km / h will enter the National Railways. The total number of such buses is planned to reach 250 Swiss