Complex sentence: The public transportation bus system, the Central Ohio Transit Authority or COTA, is widely used throughout the city of Columbus offering 18.7 million bus rides in the year of 2013 alone.
Split into simpler sentences: The public transportation bus system, the Central Ohio Transit Authority or COTA, is widely used throughout the city of Columbus. COTA documents note that approximately 18.7 million bus rides were carried out in the year of 2013 alone.