It is not too hard to avoid clipping these guys if you are aware. Most people are not mean-spirited and do not mean to hit them. They are just not paying attention. It is not on their radar that a turtle may be in the middle of the road around that next turn.
Anyone reading this blog is already probably traveling with a keen eye on the lookout for critters in the road but it is important to spread the word. As mentioned before, most people just don't think about it but when they hear stories of rescues off the road or see a PSA about looking out for wildlife crossing roadways it sinks in and hopefully it may have created another person now paying attention and avoiding the animals or even helping them cross safely to the other side.
Just letting people know you are a turtle (or any reptile) fan raises awareness too. I don't know how many friends who never paid any attention to them until they found out I was a chelonian enthusiast. I am constantly hearing how they thought of me and pulled over to help a turtle to safety. Does a soul good.
And, as always, please be careful if you stop to move an animal. Do not risk your life if you cannot pull off the road safely or if traffic is too dangerous.