Well perhaps he just esacped form his pen and got lost. I have seen this happen. Though it happens more with cows then chickens....I don't see why it couldn't happen with chickens. Maybe the chicken walked there all the time, and then they put a road in without him knowing. thats a possibility. Or maybe here got an special invittion from colonel sanders to become a fan faforite adored by all. He didn't know this meant getting killed.
Haha is this a serious question about how it comes that sometimes a chicken crosses a road? Pretty funny but i'll guess i try to answer it.
Maybe he was supposed to get slaughtered, animals almost always feel that kind of things. They know something bad is going to happen, so i think he was trying to escape. Some chicken can fly up to 5 meters. I knew someone with chickens and their chickens slept in a tree 5 meters above the ground, so he could have escaped