— User Comments —
Those "block signals" look like traffic signals to me.
They are traffic lights that were re-purposed for use as block signals. If you look at them on street view, you'll see that they only face the tracks.
There are tracks exposed next to Lee's Car Wash where the line serviced Lowe Mill after crossing the Parkway/Leeman Ferry Road.
That spur also served Martin Stove Manufacturing, as well.