From: ce11son@yahoo.ca   
      
   On Fri, 13 Feb 2015 10:28:17 -0400, Clark F Morris   
    wrote:   
      
   >On Fri, 13 Feb 2015 07:37:38 -0600, Robert Heller   
   > wrote:   
   >   
   >>At Thu, 12 Feb 2015 21:34:37 -0500 Michael Finfer    
   wrote:   
   >>   
   >>>   
   >>> much snipped   
   >>>   
   >>> There was also a statement made that Metro-North is the only application   
   >>> of under running third rail in North America.  That is not true.   
   >>> Philadelphia's Market St. subway/elevated uses it as well.  There are no   
   >>> grade crossings on that line, however.   
   >>   
   >>I think Metro-North might be stating that they are the only *surface running*   
   >>under running third rail *with grade crossings*. The LIRR has *over* running   
   >>third rail *with grade crossings*. All other third rail is either elevated or   
   >>underground (subways) and none of the others have grade crossings (they are   
   >>all grade separated). Other commuter rail is either diesel hauled or overhead   
   >>electric.   
   >   
   >The CTA has numerous grade crossings with overrunning BARE (no top   
   >cover) third rail.  The are on the Pink (ex Douglass Park), Brown   
   >(Ravenswood), Yellow (Skokie) and Purple (EVanston) lines.  The   
   >ex-Southern Region in England has numerous grade crossings with   
   >overrunning third rail.   
   >   
   You can't just walk up to it (the SR version or similar elsewhere in   
   ENG), there is usually an anti-trespass device made of multiple   
   sections of angle-cut wood making it hard to walk away from a   
   road/footpath toward the third rail :-   
   http://www.whrsoc.org.uk/WHRProject/2011/SB-AntiTrespassGrid@Rhy   
   Ddu-01032011-4.jpg   
   (a non-electrified narrow gauge line but the same basic design)   
      
   http://s0.geograph.org.uk/geophotos/02/76/74/2767437_292d58c7.jpg   
      
   or more modern versions using moulded materials :-   
   http://rail.rosehill.fishnet.co.uk/files/3413/3517/4051/Rosehill   
   Anti-Trespass_web.pdf   
      
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