Complex sentence: In 2001 and 2004 TriMet added the MAX Red Line and MAX Yellow Line to MAX. Every addition is connected to the City Center and the Transit Mall, enabling travelers from all over the city to transfer at a central location.
Split into simpler sentences: In 2001 and 2004 TriMet added the MAX Red Line and MAX Yellow Line to the MAX service it offered. With every addition to the MAX, TriMet created a central destination of City Center and the Transit Mall, enabling travelers from all over the city to change their destination at a central location.