The main reason city signage is always fata'd is that enforcement is lacking with city workers.
I have worked both the city and highway road maintenance crews. The difference is night and day. Even though they must follow the same rules for signage, highways crew always follow them but city crews rarely do. The reason? Provincial inspectors don't bother looking at city workzones, only highway. They can get away with anything they want.
On the highway, the inspectors made sure every sign was placed correctly down to the meter, angled correctly, everyone was properly dressed and had the correct knowledge to do the job. If anything wrong was found, it meant a "demerit" or fine. However, with the city, you can just place signs wherever you think works, no one will come to tell you it's wrong.
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