 Before the aircraft turned toward Dobbins, the closest airport was another general aviation airport, Cornelius Moore Airport (now Polk County Airport – Cornelius Moore Field), but the air traffic controllers did not know about it (it was just outside their area of responsibility and not shown on their screens) and it was not considered.As the aircraft ran out of altitude and options, gliding with a broken windshield and no engine power, the crew made visual contact with the ground and spotted a straight section of a rural highway below.They executed an unpowered forced landing on that road, but during the rollout the aircraft collided with a gas station/convenience store and other buildings.