A friend of mine had four hedgehogs visiting the garden every day. Towards the start of winter, and over a period of two weeks, three of them were found very slowly wandering around the lawn during the day, which is not a good sign. All three were taken to the local hedgehog rescue centre which was only a five minutes drive from my friend's house. All died within a day or two. The people running the hedgehog rescue said that they had many hedgehogs brought in from around the local area which had died soon afterwards.
My friend will be re-populating the garden if the rescue centre has any over-wintered hogs that have survived.
I believe that in some areas hedgehogs have evolved to run when caught out on a road.