Ask Slashdot: Resources For Identifying Telecom Right-of-Way Locations?

An anonymous reader writes "With threats to network neutrality, such as Verizon's recent lawsuit, I've been thinking of creating a map plotting all the locations where telecommunications companies currently use public lands via right-of-way laws. It seems that this would convey just how much telecommunications depends on public infrastructure. However, it's been difficult identifying where these locations are. Short of crowdsourcing, does anyone know of resources that could be used to create such a map?"