From: ahk@chinet.com   
      
   hancock4@bbs.cpcn.com wrote:   
      
   >http://world.nycsubway.org/perl/imgdate?20140612   
      
   >http://world.nycsubway.org/perl/imgdate?20140613   
      
   >Are towers on CTA still manual, with the train's marker lights   
   >indicating its route the to the towerman?   
      
   It depends on location. Yes, marker lights are important at some   
   manual locations.   
      
   Manual interlockings:   
   Tower 18 (northwest corner Loop "L")   
   Tower 12 (southeast corner Loop "L")   
   Clark Junction (Ravenswood branch split from Howard)   
      
   Manual interlockings that depend on track occupancy:   
   Howard tower (which also remotely operates Jarvis interlockings)   
   Controls yard traffic onto main line, non-revenue turnbacks, Howard,   
   Skokie, and Evanston movements through Howard terminal; main point of   
   major delay on "L"   
      
   Other manual towers at yard locations   
      
   Automatic:   
      
   Tail track at Dempster-Skokie   
   59th   
   Lake/Paulina (Lake-Douglas route split)   
   Ramp up to Paulina from Congress is now non-revenue trackage; this had   
   been Congress-Douglas route split   
      
   At automatic locations, if the route isn't set automatically, motorman   
   reaches for a button on a stand through his window to select route.   
   It's set based on every-other train for diverging, no more toilet seat trip.   
      
   With the exception of Jarvis, CTA has no remotely-operated interlockings   
   except switches in terminal throats.   
      
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