Hi!
On some locations you may find "po.", which means that it is a stop and not a station (i.e. a location with platforms, but with no signals nor points), or "podg.", for service locations such as junctions.
No train does any type of service in "podg." locations. If you stop here, it's only because you're waiting for another train to clear the route.
If you have to stop in a location, not only you see two times (arrival and departure, of course), but also the abbreviation "pt" or "ph".
"Pt" means it is a technical stop, e.g. for waiting for another train to clear the line. You may depart earlier than the scheduled time, if possible, and if when you arrive the signal is already clear you're allowed to not stop at all.
"Ph" means it is a commercial stop, so if you have a passenger train you must stop and wait for scheduled departure time.
"Pm" means that your train will change direction in the location, so prepare for
oblot A single vertical line means that the line only has 1 track, two lines are for - guess what! - 2 tracks.
A double horizontal line means that you're going from one scenery to another, which will be controlled by a different dispatcher.
While we're here: on the left of the timetable you see the speed limits. If they're in the upper part of the cell, you have to be within that limit before entering a certain station, while if they're in the lower part, you're supposed to keep that speed limit only after leaving the station. Be aware that speed restrictions are not shown on the timetable - I'm talking about those indicated with the triangular signals (W8).