Complex sentence: In 1997 the Ring Line, Route 50, was added to the system, providing a rapid transit connection between the south and the west of the city, eliminating the necessity of crossing the city centre.
Split into simpler sentences: In 1997 the "Ringlijn" (Ring Line), which is used for Route 50, was added to the system. The line provides a rapid transit connection between the south and the west of the city, eliminating the necessity of crossing the city centre.