Alphabet has been facing significant roadblocks in expanding Google Fiber into new U.S. cities, in part due to significant competitive and legal challenges from incumbent broadband providers like AT&T and Comcast. The companies currently are embroiled in a dispute over access to utility poles in Nashville, Tennessee, where Google claims that its competitors have been dragging their feet in making poles ready for Google's wires, even though the work has been approved. The city council is scheduled to vote Tuesday on a controversial proposal.