alt Hacker NewsAny one particular cable might not move often, but if a telco owns N bucket trucks it's a safe bet that about N cables move every workday.
Telcos are notoriously secretive about the location of their fiber. They even got most state legislatures to exempt it from state-level FOIA laws.
If you have a map of all utility poles you could probably just avoid every straight line between any of them within some reasonable distance of eachother.