I'll be a bit picky about this, since it's for a route I'm planning on building. I'm looking for a platform that is 1.3m high, 8m wide, and has two yellow safety lines, and has a counterpart that is 5m wide and has a single yellow safety line. Composition can be whatever, but concrete is preferred. Something that looks a bit like this image. The similar ones I have from gandalf0444 are a little too dark and off-color for my plans.