Variables  Total number of stops (round trip)  Average number of bus per day  Average number of operators per day  Average travel time per round (hr)  Vehicle km per day  Average passengers per day 
Total number of stops (round trip)  −0.182  −0.182  0.628  −0.176  −0.204  
Average number of bus per day  1.000  −0.485  0.998  0.992  
Average number of operators per day 
 −0.485  0.998  0.992  
Average travel time per round (hr)  −0.491  −0.534  
Vehicle km per day  0.990  
Variance Inflation Factor (VIF)  1.936  22.560  22.217  2.109 

