SW, Lost count of the number of times I have seen snakes dead OFF to the side of the road where someone had swerved to hit them. I was in the midwest last year and saw a massive king brown on the side of the road. I pulled over to have a look and as well as having been run over, some heartless @#$@# had cut its head clean off. On another occassion I was driving at night from Wyndham to Kununurra in the Kimberley just after a rain storm in the middle of summer. There was clearly one or two vehicles ahead of us but this is an outback road and it was not busy. To this day I cant get over the number of half dead writhing pythons we had to stop and dispatch. It was like the car in front of us was just lining them up!!
We have a new coastal road over here in WA joining two towns (Lancelin and Cervantes). It goes through a national park. I had heard that the road deaths were catastrophic so I checked it out for myself. In less than 20km I saw a fresh dead South West Carpet (which is rare in the wild over here), a monster King Brown, a Western Brown, about 3 pogona and too many blueys and bobtails to count.
On a funny and vengeful note, in Rick Shines book Australian snakes, he tells the story of a guy who travels around with a bucket of nails in his car. If he finds a dead snake, he fills it full of these twisted nails and puts the snake just far enough off the road that drivers would have to swerve to run it over. You can guess the rest.