Forgive me I know a little about signalling but i'm no expert on the railways by any means by I wonder if anyone can offer an explanation to this. I was standing on the Westbound platform at Bosham. There is a level crossing and signal at this station. Trains not stopping here go through at a fair old lick. I heard the announcement to stand back from edge of platform as the next train wouldn't be stopping. I looked at the signal which was green but the level crossing barriers were still in an upright position. It was only about 5 or 10 seconds later that they dropped, with about another 20 seconds until the train hurtled by. Question is shouldn't the signal be red until the barriers have dropped? With such a short time until the train came through it seemed a bit dangerous to me!