When we were out in 2002 I saw several shops selling whistles to clip to your car mirrors to scare wildlife from the car's path. Have you tried them?

No, Ian, haven't heard of them or seen them. But we have a huge "grey nomad" generation who are out on the roads in their RV's, I bet they would use them. The other deterrant of course is the "Bull Bar" which is an effective protection of the vehicle; can't say the same for the roo.

Cheerio for now

I've visited Australia six or seven times but mainly stayed in Sydney or Manley, so didn't see any kangaroos except for in the zoo. But, this is cool, while riding horses in the outback we came across groups of wallaby grazing. They would just stop and watch us go by then go back to their own business. Another time I was in in Darwin and came across a restaurant that served kangaroo stew. My friend had it and said it was very tasty. We were told that they are able to hunt them because if not, they would over populate.

Found them!! and their US Deer equivalents