Complex sentence: Starting June 18,2012, the Yellow Line was extended as part of the Rush + program, to Greenbelt on the northern end and several trains were diverted to Franconia-Springfield on the southern end.
Split into simpler sentences: Starting June 18,2012, the Yellow Line was extended as part of the Rush + program. During peak hours, the Yellow Line is extended to Greenbelt on the northern end and several trains are diverted to Franconia-Springfield on the southern end.