It would be kind of neat it they could manage to build a 5-10 storey condo wall along sections of the elevated tracks, in order to act as a noise wall. From the street, you wouldn't even know that there was an elevated rail line behind the condos. Heck, if you wanted to get really adventurous you could build a condo complex over top of the elevated corridor, or at least build a roof on it and put a common area for both condos on top (like a rooftop patio). It may not work for every section of the elevated guideway, but it would help buffer some areas.