azrael,
the right track seems to have a signal as well, but it is placed so far back, so you can hardly see it.
also in reality, not every track has a (proper) signal. only those usually used by trains (in contrast to shunting movements) and tracks often have only a signal at one end because they are usually used for one direction only.
besides, it would be very cool indeed to have the icons show the signal’s aspect as thumb has shown!
