Why despite being on a schedule and using GPS, multiple Chicago Transit Authority buses will show up at the same stop at the same time. We explain the urban physics behind the phenomenon and why the fixes are almost as frustrating as the problem.

Music beds

B.Fleischmann - Broken Monitors

Charles Mingus - Boogie Stop Shuffle

Charles Mingus - Pedal Point Blues

Thelonious Monk - Monk's Dream - Take 8

Charles Mingus - Better Git It in Your Soul