I'm a bit confused by your question? I'm 99% sure the Northeast Corridor in the area of Handy Street was elevated during the track elevation project the Pennsy undertook in the late 19th and early 20th centuries in conjunction with the building of the Raritan River Bridge. In addition, elevation continued only as far south as Baldwin street where there used to be a small yard.
As to the second part of your question, are you referring to the former pedestrian overpass structure at Sanford Street? It still appears on aerial photographs in 2008, but no longer in photos from 2010 - and had been there since at least the early 1940's.
If you've never been there, I highly suggest the website historicaerials.com
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