When the button is pressed, I always look at the meter before
moving off.
I'll make another glance to check if the meter is working after
two lamp posts.
These protocol when followed, will help solve the forgetfulness
of cabbies.
Another similar problem to this is the, " forgotten to add the
ERP "
Usually when the pax is giving you direction nearing to
the destination.
Cut a small piece of luminous Bright Yellow paper with word ERP
on it.
Placed it directly above the $2.80 fare, hope this will solve
your problems.