I see them in my neighborhood all the time. I watch for them because they do get hit by cars on occasion.
Awhile back, I was on WDW property, not far from POFQ. There was an Orange County Sheriff's car parked on the side of the road with it's lights going. As I drove closer, I saw the officer standing in front of his car. He was preventing this huge turtle from walking into the path of traffic. The turtle was the biggest I've seen. It's shell was probably a couple of feet in diameter. I have no idea what it weighed, but I doubt I could have lifted it. By the time my light changed, a WDW truck had pulled up and a couple of guys were getting out. I'm sure they were going to relocate the turtle.
Kudos to the sheriff!