I believe the UT line to Hightstown was ripped up between Hightstown and Imalystown in 1950. The construction on the NJTPK severed the line. I-195 crosses the line right where it used to end in Imalystown.
I think Conrail then came through in 1983 and tore out more of the line between Imalystown and Mount Holly. Such towns as New Egypt, Fort Dix, and Pemberton lost the line at that time. As stated above, end-of-track is in front of the restored Mount Holly station, and trains often run right to the very end of the rails. In doing so, they block the Madison Avenue crossing for periods of time. Here's a great shot of a Conrail local blocking Madison Avenue. The train station is behind the photographer.
This is a great website to view picture of the current line to Mount Holly, now called the CSAO Pemberton Industrial Track.
http://www.sjrail.com/
The Pemberton train station was also restored, and looks stunning. Click here...
http://www.ronsaari.com/stockImages/new ... tation.php