 SR 109 then heads north to enter Lebanon and have an interchange with I-40 (Exit 232) and pass through a small business district, where it passes by the original Cracker Barrel.The highway then becomes undivided and continues north through rural areas before entering an industrial area and having an interchange with US 70/SR 24 in the Martha area before leaving Lebanon and narrowing to 2-lanes.SR 109 then passes through LaGuardo before crossing the Cumberland River into Sumner County.