Her voice was quiet, always quiet. “Is this a road, Daddy?”
“A kind of road. A railroad. A road for trains.” He didn’t like it, being hemmed in on both sides. “Keep alert.”
“Why do they… why do trains get their own kind of road?”
“Their wheels fit on the rails. See the rails?” He turned, pointed down. “No steering, nothing in the way, they can carry a lot and still go fast.”
“Oh. Okay.” She raised her bow, pulled, loosed an arrow past him. Ahead, a zombie he hadn’t seen dropped like a ragdoll. “Carry a lot of what?”