In the walking dead season 4 banner ("never look back" credits to carl and rick), the 2 are seen walking through a rail road, similar to the location of telltale games the walking dead episode 3 long road ahead. I think this hints a crossover between the TV series and the video game. What do you think? Its just a guess don't be so harsh. I know there are lots of railroads in the world... LOL
Michonne pointing Macon in the map.