What is the exact significance of the blue ropes?
I had thought that meant the ducts were clear, but OR contractors recently started installing a splitter on one telegraph pole and then marked the next joint box with a white cross, despite all the telegraph poles on the street having blue rope..
The 'Test, Rod & Rope' (TRR) gangs will do as it says on the tin. They will shove rod's down ducts from box-to-box, or box-to-pole ... and pull a blue rope through when removing said rods. This rope is so the cablers can pull the fibre in come 'Build-week'.
If they can't get their rods through a section, they mark it as a blockage to be dug down on, via the white cross. If they've marked the actual box with a white cross, it will mean it needs remedial work such as a new cover & frame, or indeed a brand new box installing. Usually a bigger one to house all the new equipment alongside the existing copper stuff.