Factorio Forums

Rail signal placement availability does not seem to be consistent, generally along slight angle track curves when connected to a 45 degree angle, as seen on the left side. Right side represents standard availability of signal placement for slight curved rails. Red boxes indicate where I had assumed signals should be able to be placed, especially due to the signal placement availability in the blue box underneath. I would assume this has something to do with spacing and the code, as the signals are able to be placed normally so long as there is two rail's worth of space between each curve, but if specifically there is another curve one track-spaced below, you cannot place a signal on that short curve.

I do hope this is somewhat coherent of a report

You can copy and paste a signal from the blue box to the red boxes, but it will give the error "cannot divide segments"

Not a bug or minor issue; this appears to be a result of 116415, as when you place a curve that close below one of its collision boxes overlaps both segments.