The document discusses the evolution and growth of bus rapid transit (BRT) systems around the world based on data from BRTdata.org. It notes that as of January 2015, there were 189 cities in 60 countries operating BRT systems across 379 corridors carrying 31 million passengers daily and spanning 4,907 km in length. The largest number of BRT systems and passengers are in Latin America, though systems have been growing significantly in Asia, Europe and other regions over the past several years. BRTdata.org aims to track this continued expansion and development of BRT worldwide.