A working elevated cycleway.

Okay I admit it it's  not the full truth.  This is the peace Bridge in Calgary in Canada.   It does show you what an elevated cycle path could look like.  it looks lovely and is very popular.



Peace Bridge (Calgary) - Wikipedia, the free encyclopedia



 Technically it's also far too wide  (   heavy and expensive )  for a street by cycle system  but it does give you a good flavour of what the system could be like.