Modeling Bus BunchingAndrea Farnham, Isaac Gravestock, Lukas, Mireia

What is bus bunching?

http://interactive.wbez.org/curiouscity/bus-bunching/

• Space between buses shrinks as the front bus is delayed

• As the front bus gets more crowded, it slows even more

• Emptier following bus gets faster• Resulting accumulation of delays

• Where, when in the course of a day and why does bus bunching occur?

• Can bus bunching be predicted?

line80[, diff:= ist_an_von-shift(ist_an_von), by=.(halt_kurz_von1, datum_von)]

• created a new variable that calculated the time difference between busesarriving at each stop by day

• Defined bus bunching as <180 seconds

Occurrence of bus bunching by station in the morning

Occurrence of bus bunching by station in the evening

Frequency bus bunching mapped by station (Triemlispital -> Oerlikon)

Frequency bus bunching mapped by station (Oerlikon -> Triemlispital)