Hedgehogs would appear to increasingly uncommon here in the UK?

Even the sight of their poor squashed corpses on our roads seem to be getting more rare. I don't think that is because they are getting any better at avoiding the speeding traffic. The following inncident happened a few years ago now.

I don't know if these animals migrate, but our house is E to W. I just happened to open the backdoor one night and in, rather purposly strutted a hedghog. She, for it must have been a she, for completly ignoring my presence and with her nose in the air, she continued on a westerly course that would inevitably lead her to the (closed) front door.

I rushed ahead and opened the front door, as the hedgehog carried on up to and then through the front door, and travelled, still on the same unerring course across (safely this time anyway) the road and vanished into the western darkness.

Do you think I that may have saved her from battering herself to death on my back door?