Some time ago my son had an accident as a kangaroo jumped on the road at night. He couldn't miss it and went in search of it to have a look if something could be done for the poor thing but it was dead but he was able to retrieve the joey the mother had in her pouch. We kept it very warm over night and then took it around to the wildlife carers in the morning and they were able to raise it. They do a wonderful job as those animals need so much care and lots of warmth while they are growing up.
It just breaks my heart when I run over some animal, mainly at night, but they just come out of nowhere and you can't avoid them, you can only be thankful you don't have a major crash.