Further contemplation on this area has lead me to think that I will do away with the mirror under the bridge and replace it with a blocked-in arch way with a door, ship-lap boarding, corrugated sheeting etc all looking a bit disused. In-between this and the railway will be some temporary-looking chestnut paling fencing across the road and general workman's clutter; all adding to make the scene look like a back street/yard scenario, rather than a main road that's still in use. There will also be an open crossing gate across the tracks outside the office. Still cogitating about what goes to the left of the bridge either side of the track, as I still need some sort of view-blocker...