Not Edinburgh, but near where my sister lives in North Yorkshire there's a disused railway line which links two towns (Pickering and Malton) together, and a parallel road. The towns are a few miles apart and the land is pretty much flat as a pancake. The road is jam-packed with cars all day, and the disused railway line hasn't been converted to a cycle path, so only a few brave souls cycle on the road. Since one end of this road involves negotiating a big high speed motorway-style roundabout, this is particularly dodgy.
One poor guy had a nasty accident there and his wife has started this petition to at least have some sort of cycle lanes added to the roundabout. Could you please help out by signing it? (I know a cycle lane is not ideal, but it would be better than absolutely nothing, and a show of support here would be important, I'd say. It might get a cycle campaign off the ground, for instance.)