we put regos there
when 2 persons take e same bus (i.e. same rego)
we then may ask the time taken, etc.
i see..
if you're not comfortable with putting down the actual time of
boarding/alighting, you can consider just stating the travel time
on each bus.. this way we can see how fast or slow the journey was

how you can do this (tracking the time taken for the
journey) is, if you have a Sony Ericsson phone like mine
(w595) install the iphone theme.. it would have an additional clock
on the wallpaper..
as soon as u board the bus, unlock and then lock the keys
or go to your walkman app, but just remember not to go back to the
home screen..
the reason, once you go back to the home screen, you can see the
time just before you locked the keys or went away from the home
screen for a few sec., before returning to the real time. So you
can conveniently see the time you boarded the bus.
At all times, the phone's original clock would work as normal and
if you need to check the time during the journey, just press the
volume key to see the standby clock 