A funicular railway employs a pair of passenger vehicles which are pulled on a slope by the same cable which loops over a pulley wheel at the upper end of a track. The vehicles are permanently attached to the ends of the cable and counterbalance each other. They move synchronously: while one vehicle is ascending, the other one is descending the track. These particularities distinguish funiculars from other types of cable railways. For example, a funicular is distinguished from an inclined elevator by the presence of two vehicles which counterbalance each other.(Wikipedia)