This paraphrases some of the political signage guidance from the Knox County Election Commission.
Tennessee Freedom of Speech Act (Tenn. Code Ann. § 2-7-143) overrides local regulations and sets minimums that:
Signs are regulated by City of Knoxville Zoning Ordinance 13.3 W
City of Knoxville ROW – political signs are not allowed. Check the KGIS Maps website for the best depiction of where the city limits are – lots of finger annexations.
Private Property in City of Knoxville – Can go up 60 days before voting begins (Feb 14). Maximum size of 32 sq ft (two 4×4 signs). Removed by 5 days after election.
Signs are regulated by Knox County Zoning Ordinance 3.90 3.90.02.H.6 plus highway department regulations that are not published
Knox County ROW – Yes, but for more than 30 days. No temporary sign shall be erected at the intersection of any street in such a manner as to obstruct free and clear vision
Private Property: 60 days before voting begins, maximum size 32 sq ft. Removed 5 days after election. No limit on number of signs.
Farragut ROW – not allowed, and right-of-way is shall be deemed to extend 12 feet back from the back of street curb or the outer edge of street pavement where no curbing exists
Private Property: 60 days before voting begins. Residential Max Size: 16 sq ft, 60 days before voting begins. Commercial max size: 32 sq feet. Remove 1 day after election.
Other regulations available at the Knox County Election Commission website: https://www.knoxcounty.org/election/pdfs/Signage.pdf