the average cabby works nine and a part hours a day . a night ' s darkest evenings are 6 to 8 p . m . and even as the economy has fallen deepened into recession , the number of cab rides each week in new england has remained relatively steady . those are five the most vivid piece of information about the black cab companies to derive from a manuscripts of new documentation collected by the taxi and finance commission from rickshaws equipped with new computerized systems that record each trip and fare .
The busiest hour for a cab is 9 p.m.