I saw this article and I found it easy to understand because of the maps showing the routes.
https://www.fastcompany.com/90713249/4-underused-u-s-rail-lines-that-should-get-a-second-life
"New York City is crisscrossed with train tracks. Some of them, like the Rockaway Beach Branch, have sat abandoned for 50 years; others are majorly underused, only traveled by freight trains a few times a day. In the boroughs of Brooklyn and Queens, in particular, an old track was recently thrust into the spotlight when New York Governor Kathy Hochul announced plans to revive an underused, 14-mile, right-of-way and build what she called the Interborough Express."
https://www.fastcompany.com/90713249/4-underused-u-s-rail-lines-that-should-get-a-second-life
"New York City is crisscrossed with train tracks. Some of them, like the Rockaway Beach Branch, have sat abandoned for 50 years; others are majorly underused, only traveled by freight trains a few times a day. In the boroughs of Brooklyn and Queens, in particular, an old track was recently thrust into the spotlight when New York Governor Kathy Hochul announced plans to revive an underused, 14-mile, right-of-way and build what she called the Interborough Express."