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File:2014-0428-IMG 5141-Jct Points and Switch Arm linkage (1st SW in prev pic).JPG

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42°41′39″N 71°09′36″W / 42.694293°N 71.160076°W / 42.694293; -71.160076 Picture from or near Level Crossing Grade @ Andover St. at the North end of MBTAs Lawrence, MA yard .near Broadway.

  • Image taken to illustrate both aspects of a switch-stand Target or Ball indicator.
  1. The near junction, points, or switch is set permissible to our viewpoint so train wheels hug the near side.
  2. The far junction shows 'a full red target', indicating the way is blocked meaning the points or movable rails are set against us; the mainline in fact has the track..
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Author Fabartus

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current09:07, 29 April 2014Thumbnail for version as of 09:07, 29 April 20142,560 × 1,920 (1.33 MB)Fabartus (talk | contribs)User created page with UploadWizard

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