Yup, hv to agreed with the waiting time, jam and traffic do play
a part, but the differences will not be much, the flag down also
play a part, as for speed, not really a problem, it goes by km,
fast or slow, also by km.
As I said, alway seek the middle way, the average speed do the
best, not slow, nor not fast, too slow, you get sleepy, too fast,
you and pax may not reach your destination.