"FRA Inspection Train at the Greenport Turntable"
One of the Federal Railroad Administration's several inspection railcars pays a visit to Long Island Rail Road in the form of DOTX #216. This car made trips on all of LIRR's lines, testing all main tracks. This day (10/1/19) they covered LIRR's Main Line to Greenport. The train is seen departing Greenport heading west passing the old turntable that was used to turn around steam engines back in that era. It is listed under the National Register of Historic Places.
Below is a more detailed description of the car provided by the FRA:
"The DOTX216 is a converted Amtrak Metroliner coach equipped with a track geometry measurement system, a rail profile measuring system, a multi-car ride quality measuring system, and other state-of-the-art instrumentation for conducting railway research. DOTX216 is capable of making track measurements at speeds up to 165mph and serves as a high-speed track research instrumentation platform for a variety of tests and research projects in the Office of Research and Development. DOTX216 is also used to support efforts undertaken by the FRA's Office of Safety."