HOW TO MAKE YOUR OWN TERRAIN:
Poles

• Dowel Rods
• Balsa planks
• Balsa strips
• Heavy gauge wire
• small beads
• Glue
• posterboard

One thing to remember, unless the pole's mounted on the side of your road pieces, wires are a hinderance. Free standing poles are best to have implied wires.

1. Cut a length from a 1/4" diameter dowel between 6 and 8 inches long (uniformity of height from one pole to another is not neccessary). Be sure to make the cut as flat as possible, so it will stand well (a mitre box helps a lot here).
2. With a generous drop of glue, fasten the pole upright to a base (I use posterboard polygons, but if you have metal disks, they're probably better.)
3. Get yourself some balsa planks, at least one per pole for the cross-beams at the top. I suggest strips 1/4" x 1/8" x 1 1/2", but whatever you've got in that range will work. Glue and/or pin it to the pole (once it's dried in place), almost all the way at the top.
4. Once the cross-bar's dried on, add in some mock-supports... a pair of small, thin strips glued on to look vaguely like this...

             o o    ---     o o <- ceramic bits, see below
            --------------------
            --------------------
                  \ | | /
                    \ /  <- This is the support bit.
                    | |
                    | |

   Ok, now you can either add a second cross-bar, or go on to the details like I do...
5. Poles have those little ceramic piles at the top where the lines run accross them. These are easilly simulated with small beads painted white (and then stained with weathering washes).
6. Next come the little ladder-spikes. I use short strips of heavy gauge wire bent at the end with a pair of needle-nose pliers. I then take out my handy little drill and screw some holes in the side, then glue the wire lengths in.
7. Next comes painting... more or less anyway. Actually, it's just a quick wash with brown paint. You can add another black wash to simulate the tar coating some poles have if you want, or, for a concrete pole, use grey base and washes (but why waste that natural wood look). The base is treated the usual way, whatever system you use (frock, lichen, putty, painted sand, whatever....)
8. Useless details like fliers stapled to the poles can be added for kicks once it's ready to go.
9. If you're adding the poles to the side of your road sections, you can add in some power-lines... use string, or wire, or whathaveyou. If you don't mind the inconvenience, you can string up free-standers, but don't say I didn't warn you....