Tennessee takes a simple approach to left lane etiquette. The state literally wrote it down. And yet.
Tennessee Code Annotated § 55-8-115 requires that vehicles proceeding at less than the normal speed of traffic "shall be driven in the right-hand lane then available for traffic." The law applies to all multi-lane highways. There is a passing exception — you're allowed in the left lane when overtaking another vehicle — but the expectation is clear: pass, then return right.
Tennessee also has a secondary provision that applies to the interstate specifically. On divided highways with two or more lanes in each direction, slower vehicles must keep right except when passing. The penalty for violation is a Class C misdemeanor with fines up to $50. That's not life-altering, but it's enough to confirm the state is serious.
The legislature passed updates to the law in 2016 specifically targeting left lane camping — the same era when several other states tightened their rules. Tennessee wasn't early to the party, but it showed up.
What It Looks Like in Practice
Driving I-40 through Nashville or I-24 through Chattanooga tells you everything you need to know. The theoretical version of the law and the lived experience share very little DNA.
The left lane on Tennessee interstates operates by its own rules: slower vehicles, vehicles that merged and forgot to un-merge, drivers on phone calls, and the occasional truck that decided the left lane has better asphalt. The right lane moves faster in patches. Signs that say "Slower Traffic Keep Right" appear roughly every eight miles and are treated as suggestions from a distant, optimistic government.
Tennessee State Police do enforce the law — there are documented tickets — but enforcement is inconsistent enough that left lane camping remains a reliable feature of the commute rather than an exception.
Why It Matters More Now
Labor Day weekend is two weeks out. That means I-40, I-65, and I-24 are about to fill with travelers doing the last big road trip of summer. Every lane camper becomes a mobile obstacle for hundreds of drivers behind them. The math on frustration compounds quickly.
Tennessee's law exists precisely for this scenario. A clear left lane moves traffic more efficiently, reduces brake-checking, and makes the overall experience less of a test of everyone's patience. The research on this is unambiguous. The behavior on the ground is less cooperative.
For context on how other states handle this, read our 10-state left lane law breakdown — Tennessee fits a familiar pattern.
The Keep Right Principle
The rule isn't complicated: pass when you need to, then move right. It applies in Tennessee whether you're going 70 or 90. Speed is not the determining factor. Relative speed is. If cars are stacking behind you, you're in the wrong lane regardless of how fast you're going.
Tennessee's law matches what most drivers instinctively understand but struggle to execute: the left lane is not a travel lane. It's a passing lane. This distinction exists in most U.S. states, and Tennessee codified it clearly.
The left lane camper isn't always malicious. Sometimes it's habit, sometimes it's not checking mirrors, sometimes it's the GPS that said "stay left" four exits ago. The result is the same either way — a line of cars that shouldn't be there, a commute that takes longer than it needs to, and a state law being quietly violated at 68 miles per hour.
Tennessee has the law. It just needs the drivers to read it.
If you want to read about how Georgia handles the same issue, see our Georgia left lane law post.
If you're ready to make your position on left-lane camping official, leftlanerehab.com has the magnets for that.