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It is currently Thu Dec 05, 2024 7:33 am

Hicksville Station - New Signals

Discussion of the past and present operations of the Long Island Rail Road.

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Re: Hicksville Station - New Signals

  by west point
 
Head-end View wrote: ↑Wed Oct 09, 2024 7:48 pm Also, wasn't one factor involved in PRR's choice of yellow pos-light sig's that they were easier to see in foggy conditions than color-lights ?
Do not know about PRR but on N&W they were all yellow due to some engineers being color blind. After last N&W color blind engineer on a district retired N&W would convert that district to color lights/

Re: Hicksville Station - New Signals

  by workextra
 
I believe PRR had the same issue with Color Blind Engineers.
One of my biggest complaints of the position light system was the full head on the pedestal type head was not capable of displaying a slow clear aspect .
Where this was the case the Slow approach was used in lieu of the slow clear. The 3 head color
Light signals can display all necessary aspects on a full size signal.
MAS, Lim/Med, Slo/Rst.

The other major difference with the N&W adaptation of the PRR position lights was that the N&W used route based signaling vs the PRRs speed based signals

The approach medium aspect here
Would be the approach diverging aspect on the N&W
The Diverging Clear aspect would give you the condition of the block but not the speed to do at the crossover. That would be in the division timetable.
Someone more experienced on route signals would have to correct me if I’m missing anything.
PRR also owned a large controlling share in the N&W, and I believe the LV as well.

Re: Hicksville Station - New Signals

  by ExCon90
 
workextra wrote: ↑Sat Oct 12, 2024 2:50 am I believe PRR had the same issue with Color Blind Engineers.
One of my biggest complaints of the position light system was the full head on the pedestal type head was not capable of displaying a slow clear aspect .
Where this was the case the Slow approach was used in lieu of the slow clear. The 3 head colorOn the PRR
Light signals can display all necessary aspects on a full size signal.
MAS, Lim/Med, Slo/Rst.
On the PRR even the standard high signals couldn't -- and can't -- display Slow Clear; the best you can get is Slow Approach and let the cab signal clear up when you're out of the interlocking. When I worked in Pittsburgh in 1961 there was an enormous signal gantry at the east end of PITT spanning what used to be an array of tracks (only two left by then); the only signal on the gantry was a lone dwarf, the only kind able to display Slow Clear.
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