The photos below are from a 2014 blog post ( [position-light.blogspot.com
It looks like he is shooting pics from the back of the California Zephyr.
In the first pic below, I am just curious why are signals placed more-or-less over the right-hand track. I take it the green signal is for the left hand track. Was it just SP practice so that the person sitting on right had a better view of the signals? I am accustomed to CB&Q signal bridges where the signals were right above the track they governed.
The searchlights at SHED are safe for now as are the SP color lights between there and the next Searchlit interlocking at WEST NORDEN. However between there and TRUCKEE all the searchlights have been removed
In the next photo below, I take it this signal governs the left hand track.
The photo caption also says something about "reverse" automatic block signalling. Does anyone know what that is about?
Beyond Truckee all the "reverse" ABS signaling is also being prepared to CTC conversion.