Here are some answers, in the spirit of various well-known physicists, to the age-old question:
Albert Einstein: The chicken did not cross the road. The road passed beneath the chicken.
Isaac Newton: Chickens at rest tend to stay at rest. Chickens in motion tend to cross roads.
Wolfgang Pauli: There was already a chicken on this side of the road.
Carl Sagan: There are billions and billions of such chickens, crossing roads just like this one, all across the universe. [Apologies for perpetuating the misquote.]
Jean-Dernard-Leon Foucault: What’s interesting is that if you wait a few hours, it will be crossing the road a few inches back that way.
Robert Van de Graaf: Hey, doesn’t it look funny with all its feathers sticking up like that?
Albert Michelson and Edward Morley: Our experiment was a failure. We could not detect the road.
Stephen Hawking: Chicken fluctuations will inevitably create a scenario where a chicken ends up on the other side of the yellow line, in which case there is a nonzero probability that it will escape to the other side.