Do nonbuilding structures, e.g. street signs, bridges, railway, walkways, etc. enjoy copyright protection? I know they do not have copyright in the US. What about other countries? Can I shoot them freely?
I would not give it a second thought! Even if they were, it would make most photogrphs illegal and would be unenforceable. I am sure the law has better things to do than prosecute practically everyone who has a camera!