The Law of Bus Waiting

The Law of Bus Waiting states that when at a bus stop, the service number you are waiting for will not come until all other service numbers have come at least once (if not multiple times) thereby resulting in personal frustration and an increased lack of faith in the public transportation system. 

This Law is not restricted to a particular service number, but instead, applies to whatever service number you are currently waiting for. 

The frustration level, F can be denoted by the following relationship:

F = f (n, t)

where

n is the number of buses arriving at the bus stop before the FIRST service number (which you are currently waiting for) arrives

t is the waiting time

Mathematically, F can be calculated as follows:

F = (k + 1) t exp (n)

where 

k is an amplification factor equal to the ADDITIONAL number of service numbers (which you are currently waiting for) that arrive together in quick succession (i.e. one or more buses immediately behind the other(s))