A few years ago I had to travel twice a week to South Wales,and needed to be there by 6.00am,so in the dead of winter I am on the M4 ,I soon learned to stay in the middle lane at 3am in the morning, because for miles there is a large deer population,who seem to enjoy bounding across the motorway,I used to see them at least once a week,only once did I have to stop sharply because the last few were still coming onto my side of the road,I reasoned that in the middle lane I could go left or right to avoid them,I am not surprised there are over 40,000 deer accidents every year,as to how strong they are there is a video online of a Ram attacking a decent size male deer,the deer made mincemeat of him.