Funny you should post this. I recently had two sad run-ins with cats.
I take the bus to work in the mornings. I was walking to the bus stop the other day, and heard this mewling. As I approached the sound, I realized it was a cat, in the middle of the road, with both of it's back legs broken. It was obvious that someone had hit it, and not bothered to stop.
The cat was scrambling with it's front paws every time a car approached. So I stood in front of the cat and started directing cars around it (it calmed down when it realized the cars were staying away from it, but it didn't stop crying). Finally someone in a car stopped and said they could take it to their vet, who was open early.
- If the person hitting the cat and leaving it wasn't mean enough - while I was standing there assessing the situation, a lady came out of her house (that the cat was in front of) and says, "That cat's been here all morning. It woke me up early with that noise."
WTF? If the noise bothered you so much, call animal control to have it put down! Don't just be annoyed that the cat's agony is inconveniencing you
Story II
I drove to Maryland this weekend for my niece's 1st b-day. Along the highway there was a itty bitty kitty - we're talking weeks old, definitely under eight. There was a car with his flashers on in front of it. A guy gets out of his car, picks up the cat from the road, and puts it in the grassy median area. Why not put it on the side? I have no idea, the thing was stranded between two really busy stretches of highway.
I took an exit and spun around to get on the same side as the kitten. But when I pulled over I couldn't find it again. I ididn't see any splats on the road, so I'm hoping it made it back to his fam.
tl;dr You're lucky that you have a situation where you can help the cat you found.