Complex sentence: The busiest Muni bus line is the 38 Geary, which travels in the east--west direction along the Geary corridor, and has an average speed of only, taking over 50 minutes to travel from the Richmond District to the Transbay Terminal when operating on schedule.
Split into simpler sentences: The busiest Muni bus line is the 38 Geary, which travels in the east--west direction along the Geary corridor, and has an average speed of only. Door to door, it takes over 50 minutes to traverse the distance from the Richmond District to the Transbay Terminal when operating on schedule.