DescriptionLD block limit Riverhead station 240727.jpg
English: LD block limit immediately east of the Riverhead LIRR station, part of the last remaining stretch of manual-block (unsignaled) territory on the Long Island Rail Road between Ronkonkoma and Greenport.
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LD block limit immediately east of the Riverhead LIRR station, part of the last remaining stretch of manual-block (unsignaled) territory on the Long Island Rail Road between Ronkonkoma and Greenport.