I’d definitely try to find out if the animal was dead or alive. Whether the animal was dangerous or not would determine if I got out of my car. Animals that may usually not bite or be dangerous, can be when they’re injured. I wouldn’t want to leave an animal that’s been injured to die in pain. I’m lucky not to have ever had to deal with this and I hope I never have to. Once I’d tried to determine if it’s alive or dead, I’d call an animal rescue organisation to try to get the live animal help. If it was dead, and it was a marsupial, I’d check for babies and then the local council if it was dead. It would need removing to avoid causing further safety problems.