Love this photo.
The artist has taken a mundane every day subject that we would normally walk by without paying much attention to and made it noticeable and artistic piece of photography.
You have perfect exposure with no loss of detail. The sky is interesting without detracting from the subject.
There is symmetry, shapes and lines that all contribute to a well composed photograph. Contrasting colors help impact.
The reflection in the puddle as well as the number 7 also add interest without being distracting due to the use of the 2 white lines leading the eye to the subject.
Very nice