Perhaps you need to take a handheld Palm with you next
time.
Take note of your time, and route.
Write down the number of chiobus.
Next you continue the experiment. Ride the MRT again on different
time and on different route.
Perhaps, for instance, take MRT during afternoon rush hour on a
City route. Write down the number of chiobus you spot.
Then take MRT again during Saturday night, on a Shopping Belt
route. Write down again the number of chiobus you spot.
Do the same and compare with, say, Monday morning on an Industrial
route in the North, or Wednesday afternoon 3pm on a Suburban route
in the West.
Now when you have completed your experiment so far to this point,
when you have the data on all the routes and times, you have to
continue to do it for a significant length of time. THEN you can
compare whether there is a drop of chiobus.
Otherwise I must say your premise is very weak.
Ok good luck.
