Here's what I'm doing with my current route. The reason I'm doing this is pretty obvious; it's a big city with lots of tracks, and it's messy. It's a fictional route of course.
You may think I'm weird for doing all this, and I am. :hehe:
1. Geographical map
This is a map of the city (pen and paper, quick and dirty, or you can plan it bigtime if you have some hefty scenarios in your head). The map includes, but is of course not limited to: rivers, stations, industries, tracks, tunnels, bridges, the biggest obstacles (like maybe there's an "old" area of town that the track had to be built around, or a mountain in the middle of the city... oops...). You can of course make this as detailed as you want, I choose to ignore the fact that something is double-/quadrupletracked at this point. Just one line where tracks go, and a small symbol for stations (like a square for big ones and a circle for small ones... also I use a triangle for industries). You can put names on stations and industries if you have room.
A map is probably useful in all routes, not just cities, to give you an overview of what you want.
I like to draw different versions of central points. Say a track doesn't come into the city from the east, but instead north east, would that give a different setup, etc... but then again I'm weird, remember?
2. Function map (probably not needed for very simple routes)
There needs to be a system to the web of tracks, so every line (scenario obviously) has a certain function, and either the tracks were built for this function, or the function had to adapt to the current tracks in some way. This is what the route map is for. Basically you can make it look like a subway map, where each route is one line, and several lines can go parallell between a few stations even if there is only one track, etc. You probably know what I mean.
This is a good place to take notes on each function too, regarding adapting to current track system, etc.
Also, this map may take a lot of time to get right. Use a pencil or an eraseable pen.
3. Track map (mainly for central areas with lots of tracks to keep track of (heh
))
This is the map where you actually draw each single track piece. It does neither have to be geographical or proportionally correct. In fact, it's best if it's not, because this map is intended to give you an overview of the tracks themselves, and it's best to postpone the details until you're actually building it in surveyor. The eyes work better than the brain in this situation.
Here's an example of a similar map. I don't know the technical term for this type of map, but it's one you can often see in control rooms.
Anyways, our track map does not necessarily contain signals (again, this is best to decide while building), mainly because it's not proportional to the "real" route. It may, however, contain direction markers.
A great tool when making this type of map is grid paper.
It's always easier to have maps when you're making routes, instead of going from stuff in your head, because your ideas may change over night, and then you don't remember why you did this and that, and it was probably something brilliant, but now you forgot, etc...
I will post some pictures of my own maps for each of these three categories once my camera is recharged (should take half an hour).
-A