September 1, 2010
![The patch of the Ridgetop, Tennessee, Police Department features a train emerging from a railroad tunnel, constructed in 1905 and one of the longest self-supporting tunnels in the world. When completed, it opened a direct line between Louisville, Kentucky, and Nashville and brought expansion, both in population and economy.](https://leb.fbi.gov/image-repository/ridgetop-tennessee-police-department.jpeg/@@images/image/large)
The patch of the Ridgetop, Tennessee, Police Department features a train emerging from a railroad tunnel, constructed in 1905 and one of the longest self-supporting tunnels in the world. When completed, it opened a direct line between Louisville, Kentucky, and Nashville and brought expansion, both in population and economy.