I know I will get flamed for this, but to be honest I ignore flames anymore
if your a route builder, and you need buildings, signs, and other static objects that have no speical features (sound, smoke, other effects) Sketchup can be helpful. there is an 800 Minute demo of the pro version that allows you to export. however the new version overwrites google sketchup, so unless you can hunt down an old version, your screwed
I spent months requesting an Island Station for my subway route, in the end, no one ever stepped forward, si using sketchup, i made exactly what i needed. I know all you "real" 3D modelers always try to say bad things to people that want to expermient with sketchup, but when i have to wait 5 months for something, and end up having to build it myself using a crappy 3D program just so it actually gets done, I will use whatever 3D program i frigging want, and you can lay off me for what my choice is
if you dont like it, dont download it, plain and simple