I have no idea why the chicken would cross the road, but just yesterday I saw a turkey cross the road....tippy toeing into the woods as I cruised by in my car. Turkeys do that funny "thing" with their necks. Hmmm. I see other animals cross the road as well. In my neighborhood there are several cats who skitter across the road. I think they're out mousing, which is fine by me. Often squirrels cross the road, the yard, the roof top, the electric wires; they just like to cross things I guess. It is never good when a skunk is crossing the road. Watch out and steer clear. Once a deer crossed the road just before I got there but unfortunately the deer's crossing was in tandem with a huge pick-up truck. That was not a good result for either party.
I don't know why or how or when the chicken crossed the road, but if she was like the rest of us it was rather frequently and for good cause.