It notes something you have just registered, said offhandedly and half to yourself: so this is right by your house, your face is totally crumpled, oh, it is late. It sounds older and gruffer than the polite 군요, so it fits a familiar or a solo mutter rather than a stranger. With 겠 in front it becomes a prediction, as in the line about this being a hit inside a car.
Register: casual plain speech; sounds like an older speaker