Difference between revisions of "Railroad signals"

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{{Portal|Transportation}}[[Category:Transportation]]
 
{{Portal|Transportation}}[[Category:Transportation]]
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Modern signaling uses one or two lights showing several aspects using the following colors: black (no lights) - Stop, white - Warning, blue - Clear, green - Restrictive. The signal head's background is reflective. The blue light is created by raising and holding a weighted lens in front of the white light. All aspects are fail-safe.
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Modern line signals contains one white light bulb, and, if needed, a green light bulb. The background is reflective, so that the absent of light can easily be spotted. A blue colored light are created by raising and holding a weighted lens in front of the white light bulb. A single bulb signal can show 5 aspects, while a dual bulb signal can show 8 aspects. Dual bulb signals are used before diverging lines and station. All aspects are fail-safe. Opposing signals are places 1.5-2 [[reung|reungs]] ({{Measconv|target=mile|source=reung|measure=1.5|round=2}}-{{Measconv|target=mile|source=reung|measure=2|round=2}} mi/{{Measconv|target=km|source=reung|measure=1.5|round=2}}-{{Measconv|target=km|source=reung|measure=2|round=2}} km) apart as a protective measure against passing signals that has failed to stop aspect.
  
 
{{Table/Start|Signaling}}
 
{{Table/Start|Signaling}}

Latest revision as of 23:22, 19 March 2013

Transportation template.png Transportation portal

Modern line signals contains one white light bulb, and, if needed, a green light bulb. The background is reflective, so that the absent of light can easily be spotted. A blue colored light are created by raising and holding a weighted lens in front of the white light bulb. A single bulb signal can show 5 aspects, while a dual bulb signal can show 8 aspects. Dual bulb signals are used before diverging lines and station. All aspects are fail-safe. Opposing signals are places 1.5-2 reungs (1.06-1.42 mi/1.71-2.28 km) apart as a protective measure against passing signals that has failed to stop aspect.

 Signaling 
  Aspect     Meaning     Speed limit per hour     Expect  
  No lights     Stop     10 reung (7 mi/11 km)      
  white     warning     30 reung (21 mi/34 km)     stop  
  flashing white     high speed warning     70 reung (50 mi/80 km)     warning  
  green     restriction     25 reung (18 mi/29 km)     divergence  
  green+white     restrictive warning     70 reung (50 mi/80 km)     restriction  
  green+blue     restrictive clear     85 reung (60 mi/97 km)     restrictive warning  
  blue     clear     115 reung (82 mi/131 km)     any signal except stop  
  flashing blue     high speed clear     140 reung (99 mi/160 km)     clear  
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