This is a challenging photo to 'critique'. I can certainly see how it meets the challenge for you. It's probalby a road sign that you pass every day... something simple... something without frills.
The image doesn't hold any special interest for me as a viewer. I can't look at this and be inspired by the composition, photographic technique, or the subject. Even though it meets the challenge, there needs to be something photographically interesting about the image as well for higher placements most likely.
i like the high-key nature of this shot. The poles at the bottom distract a bit and I think it could benefit from a cropping that puts the sign a little more right and down (therefore knocking out the poles and putting a little more blue sky into the photo). [7]
Nice colors, nice subject. Too bad the lamp posts protrude into the composition from below, they kind of throw off the emperor's groove. Maybe if you got down just a smidge lower, you could isolate the sign? Still, an interesting photo. Is it from the UK? I was just there a few weeks ago and I remember seeing this kind of sign.
The poles (1 to the left and 1 to the right) are a bit distracting. Maybe a lower view point to eliminate them would have been better. Very clear, nice skyline.