It looks like your stop sign itself isn't a true octagon? The diagonals look considerably longer than the vertical/horizontal parts. If you have a reference from somewhere that looks that way, it's totally cool-- but as a person living in the US, something felt odd about it until I looked closer.
Hi! To me it feels a bit like a miniature due to its proportions/ height the signs hang. Can you share reference used? Including a collection of references in a presentation would give the viewer a point of comparison. Maybe it helps to have a render showing it in context, even if it's just next to silhouette figure.