ION - Waterloo Region's Light Rail Transit

[timc]

I can only think of two things: Only single line (so no crossover) until past the next transfer point. Or down slop up ahead. I'm going with the single line though.

I saw these signs too between Mill and blockline station. Where they are situated it looks as if it is signaling a bridge or culvert ahead. These signs are only on the sections of the track where it is just trains. So my theory is that it has something to do with maintenance in regards to the bridges and culverts.

Edit: These signs are now up on both sides of the mill crossover and both sides of the expressway underpass. Now I'm thinking that it has something to do with possible obstructions or ATP.

I have seen more of them in the last few days along the spur line. I took a closer look and they seem to be temporary signs. So I guess that they are likely for maintenance work, as someone else suggested, rather than operations.