Visible crew/equipment: After the train crashes into the horse trailer, there is a scene with Denzel's train talking to dispatch. They are talking about how Denzel's train is too big to fit in one of the sidings. During this scene, the camera is moving around the train looking through the cabin. The head of a crew member is visible reflected in the glass.
Visible crew/equipment: When 7375 and 7376 pull out of the siding in the attempt to slow down 777, Judd Stewart is the only engineer controlling to two engines, he is sat in the front engine (7375). However, when the camera is on the second engine, 7376, a person can be shown sat in the cab of 7376.
Suggested correction: Not necessarily. Some engines may not have a rear cab access (like Frank/Will's engine had). And even if the rescue engine did have a rear cab access 777's engine only had a side access stair which at the speed it was going is more difficult to climb over from the engine in front of it.
Actually 777's catwalk goes across the front, from side stair to side stair, but someone would have to leap over a rail or a chain to get onto it from the other engine. Why would there be stairs on the right side unless there was a catwalk to get to the door on the left side?