Tennessee Driving Laws 2026: Speed Limits, DUI BAC and Tennessee Driver Services Road Rules for the Permit Test

What are the speed limits in Tennessee on interstate highways? The Tennessee Driver License Manual says most rural interstate sections are posted at 70 mph, while urban or metropolitan sections are typically 55 mph; posted signs control. Tennessee requires a turn signal at least 50 feet before a turn or lane change. Headlights are required from 30 minutes after sunset until 30 minutes before sunrise, when daylight is insufficient to see persons or vehicles clearly at 200 feet, and when precipitation requires constant windshield-wiper use. Drivers under 21 are subject to Tennessee's 0.02% BAC rule, and DUI enforcement may include a search warrant for a blood sample after a refusal.

1. Tennessee Speed Limits: 55 MPH Highways, 70 MPH Rural Interstates and Interstate Minimum Speeds

What is the speed limit in Tennessee when no sign is posted? Unless otherwise posted, the limit on primary and secondary state and federal highways is 55 mph. Tennessee does not set one universal residential speed for every city street; business, residential and school zones use posted limits, which may be as low as 25 or 35 mph.

Key test points: Tennessee's maximum interstate speed is 70 mph, but that limit does not apply to every interstate section. Driving below 55 mph in the leftmost interstate lane is unlawful unless congestion and traffic flow prevent safe travel at that speed; the right-lane minimum is 45 mph under normal conditions. Exceeding a school-zone speed limit is reckless driving and adds six points. Speeding in an active work zone carries a $250-$500 fine.

2. Tennessee Right-of-Way: 4-Way Stops, Funeral Processions and Interstate Merging

Who has the right-of-way at a 4-way stop in Tennessee? The first vehicle to stop proceeds first; when vehicles stop at the same time, the driver on the left yields to the driver on the right. Drivers entering an interstate must yield to traffic already on the interstate. On a two-lane roadway, a driver following a properly identified funeral procession may not pass it, and drivers may not cut between procession vehicles unless directed by a traffic officer.

4-way stop (all arrive at once)

Driver to the right

4-way stop (one arrives first)

Driver who arrived first

Roundabout / traffic circle

Vehicles already inside the circle

Emergency vehicles (lights/siren)

Emergency vehicle, pull to the right and stop

Pedestrians in crosswalk

Pedestrians in the crosswalk; stop and yield as necessary

T-intersection (no signs)

Through road traffic; drivers on the dead-end must yield

Yield sign

Cross traffic and pedestrians; stop if necessary before entering

Merging onto a highway

Traffic already on the highway

3. Tennessee Turn Signal and Intersection Rules: Signal at Least 50 Feet Before Turning

Can you turn right on red in Tennessee, and how far before a turn must you signal? Tennessee requires the turn signal to be used for at least 50 feet before a turn or lane change. A right turn on red is allowed after a complete stop unless a sign prohibits it. A left turn on red is allowed only from a one-way street onto another one-way street, after a complete stop and when turns on red are not prohibited.

Right turn on red

Permitted after a full stop unless a sign prohibits it. Yield to pedestrians and cross traffic.

No right turn on red

When posted, you must wait for a green light before turning right.

Left turn on red

Only allowed from a one-way street onto another one-way street, after a full stop.

Left turn from two-way street

Start from the left lane; end in the left lane of the cross street.

Right turn

Stay as close to the right curb as possible; end in the right lane.

U-turns

Not permitted at a traffic-controlled intersection, between intersections in a city, on an interstate, where signs prohibit it, or where you cannot see traffic for at least 500 feet in both directions.

4. Tennessee Lane Rules: Interstate Minimum Speeds and Shared Center Turn Lanes

When can you use a shared center turn lane in Tennessee, and what do solid and broken lane lines mean? A shared center turn lane is reserved for left turns from or into the roadway. It cannot be used for passing or ordinary through travel, and Tennessee limits travel in the lane to 300 feet.

Center turn lane (CTSL)

Used only to begin or complete a left turn; not for through travel or merging. You may travel no more than 300 feet in the CTSL.

Solid white line

A single solid white line means stay in your lane and do not cross it to pass unless an emergency requires a lane change. Do not cross double solid white lines.

Solid yellow line (your side)

No passing allowed.

Broken yellow line

Passing allowed when safe.

Solid + Broken yellow centerline

Passing allowed only on the broken-line side.

5. Passing in Tennessee: No-Passing Areas and 3-Foot Bicycle Clearance

When is passing illegal in Tennessee, and how much room must you leave when passing a bicycle? A driver may pass only when the roadway, lane markings, visibility and oncoming traffic allow the maneuver to be completed safely.

• Pass on the left only when it is safe and legal, and do not return to the right lane until safely clear of the vehicle being passed.
• Do not cross the center line to pass when approaching an intersection, railroad crossing, narrow bridge, viaduct, tunnel, hill or curve.
• Do not cross the center line to pass when a solid yellow line is on your side of the center marking.
• Do not pass a vehicle that has stopped for a pedestrian in a marked or unmarked crosswalk.
• A driver being passed must maintain speed and must not speed up to prevent the pass.
• When passing a bicyclist traveling in the same direction, slow down and leave at least 3 feet of clearance until safely past.
• Do not pass a stopped school bus or church bus while its red warning lights are flashing and its stop arm is extended.
• Passing on the right is allowed only where the roadway and traffic conditions permit it safely. Never use a shoulder, bicycle lane, parking lane, or an emergency lane near a traffic light or stop sign to pass.

6. Tennessee Following Distance: 2-Second Rule and 4-Second Minimum in Poor Conditions

What is the safe following distance in Tennessee? Under normal conditions, use at least the 2-second rule. Increase the gap to a minimum of four seconds during inclement weather, higher-speed interstate driving, night driving and when following a motorcycle.

7. Tennessee School Bus Law: Divided-Highway Exception, Penalties and Move Over Rule

Do drivers in both directions have to stop for a school bus in Tennessee? On an undivided roadway, traffic meeting or overtaking a stopped school or church bus must stop when the red warning lights are flashing and the stop arm is extended. The opposite-direction exception applies only when separate roadways are divided by a median space or barrier not suitable for vehicle travel.

School Buses

• When a school bus or church bus stops with flashing red lights and an extended stop arm, traffic meeting or overtaking the bus must stop unless the divided-highway exception applies.
• On a highway with separate roadways divided by a median space or physical barrier not suitable for vehicle travel, an opposite-direction driver does not have to stop but must proceed cautiously.
• A center turn lane is not a median or barrier. On a four-lane road with a center turn lane, traffic in both directions must stop.
• Remain stopped until the bus resumes motion and the stop arm is retracted.
• Illegally passing a stopped school, church or youth bus is a Class A misdemeanor, carries a fine of $250-$1,000, and is assigned 8 points on the Tennessee driving record.
• School buses and passenger buses must stop at highway-railway crossings whether or not crossing signals are activated.

Emergency Vehicles

• When an emergency vehicle approaches with audible or visual signals, pull as close as safely practical to the right edge or curb, clear of the intersection, and stop.
• Tennessee Move Over Law: On a multi-lane roadway with at least two lanes moving in your direction, move into a lane not adjacent to a stationary emergency, maintenance, recovery, utility or sanitation vehicle displaying flashing lights when the lane change can be made safely.
• The same move-over rule applies when approaching a stationary motor vehicle on the shoulder, emergency lane or median with its emergency flashers on. When changing lanes is impossible or unsafe, proceed cautiously, reduce speed and maintain a safe speed for conditions.

8. Tennessee DUI Laws: 0.08% BAC, Under-21 0.02% Rule and First-Offense Penalties

What is the legal BAC limit in Tennessee for drivers under 21, and what happens after a chemical-test refusal? Tennessee uses the term DUI. The law covers alcohol, marijuana, prescription medicine, over-the-counter medicine and other impairing drugs.

9. Tennessee Seat Belt and Child Restraint Laws: Rear-Facing, Booster and Driver Responsibility

Who is responsible when a child is not properly restrained in Tennessee? Seat belt and child-restraint violations are primary-enforcement offenses. The driver is generally responsible for properly restraining a child under age 16, unless the child's parent or legal guardian is present in the vehicle and is not driving.

10. Tennessee Parking Rules: Hydrant, Crosswalk, Fire Station and Railroad Distances

How far from a fire hydrant can you park in Tennessee, and how close can you park to a railroad crossing or fire station driveway? These statewide distance rules apply in addition to posted local restrictions.

• Within 15 feet of a fire hydrant
• Within 20 feet of a crosswalk, or inside the marked crosswalk
• Within 30 feet of a traffic signal, stop sign or other traffic-control device
• Within 50 feet of a railroad crossing
• Within 20 feet of a fire station driveway on the same side of the street, or within 75 feet on the opposite side
• In front of a public or private driveway, within an intersection, on a sidewalk, on a bridge or inside a tunnel
• White curb: stop only long enough to pick up or drop off passengers. Yellow curb: stop only long enough to load or unload and stay with the vehicle. Red curb: do not stop, stand or park.
• Double parking and parking on the traffic side of another parked vehicle are prohibited.
• Downhill with a curb: turn wheels toward the curb. Uphill with a curb: turn wheels away from the curb. Without a curb, turn wheels toward the edge of the roadway.

11. Driving in Tennessee Weather: Rain, Mountain Fog, Flooding and Winter Ice

Are headlights required in the rain in Tennessee, and what should you do in fog, standing water or winter ice? Tennessee drivers may encounter heavy rain, mountain fog, flash flooding and freezing conditions, so speed and following distance must be adjusted to visibility and traction.

• Headlights are required from 30 minutes after sunset until 30 minutes before sunrise, whenever daylight is insufficient to see persons or vehicles clearly at 200 feet, and when precipitation requires constant windshield-wiper use.
• In heavy fog, use low beams; high beams reflect from fog and reduce visibility.
• If the vehicle begins to hydroplane, ease off the accelerator. Do not brake hard or turn sharply.
• On ice or snow, brake gently well in advance, reduce speed and increase following distance to at least four seconds or more as conditions require.
• If the vehicle begins to skid, look and steer in the direction you want the front of the vehicle to go, without overcorrecting.
• Never use cruise control on wet, icy or otherwise slippery roads.
• Do not drive around flood barricades or into water covering the roadway. Turn around and use another route.

12. Tennessee Driver License Points: 12 Points in 12 Months and Juvenile Rules

How many points trigger a Tennessee license suspension review? Adult drivers who accumulate 12 or more points within any 12-month period receive a notice of proposed suspension and an opportunity for an administrative hearing. Drivers under 18 enter the juvenile Driver Improvement process after accumulating 6 or more points within 12 months.

Point-removal option: An eligible Tennessee driver may remove up to five points for one speeding conviction by completing an approved four-hour driver-education course within 90 days of the conviction. The conviction remains on the record, and this option may be used for only one speeding conviction in a four-year period.

13. Tennessee Headlight Law: 200-Foot Visibility and 500-Foot High-Beam Dimming

When are headlights required in Tennessee, and when must high beams be dimmed? Tennessee uses a 200-foot daylight-visibility trigger and requires high beams to be dimmed within 500 feet of both an oncoming vehicle and a vehicle being followed.

Key test point: Tennessee uses 500 feet for both situations: dim for oncoming traffic within 500 feet and dim when following another vehicle within 500 feet. The 200-foot number is the daylight-visibility point at which headlights are required.

14. Night Driving in Tennessee: Headlight Hours, 4-Second Following and Mountain Roads

What does overdriving your headlights mean in Tennessee? At night, drive slowly enough to stop within the clear distance illuminated ahead. Tennessee also calls for at least a four-second following distance at night, rather than the normal two-second minimum.

15. Tennessee Hands Free Law: Handheld Device Ban, Fines and Driving-Record Points

Is it legal to hold a phone while driving in Tennessee? The Tennessee Hands Free Law applies to all drivers and makes holding or supporting a cellphone or mobile device with any part of the body illegal while operating a motor vehicle.

Key test point: Tennessee bans holding or supporting a phone with any part of the body while driving. Hands-free voice functions may be used as allowed by law, but texting, watching video and recording or broadcasting video remain prohibited.

16. Tennessee Railroad Crossings: Stop 15-50 Feet From the Nearest Rail

How far from railroad tracks must you stop in Tennessee, and which vehicles must stop at every highway-railway crossing? When a stop is required, stop within 50 feet but not closer than 15 feet from the nearest rail.

Key test point: Never drive around or under a lowered crossing gate. Wait until the gates are fully raised, warning lights have stopped and every track is clear.

17. Tennessee Roundabout Rules: Yield on Entry, Choose a Lane and Signal the Exit

Who has the right-of-way in a Tennessee roundabout, and should you signal when leaving? Drivers entering must yield to vehicles already circulating, choose the correct lane before entering, travel counterclockwise and use the right turn signal when exiting.

Key test point: Entering drivers yield to traffic already inside. If you miss the intended exit, continue around the roundabout and try again rather than stopping or making a sudden lane change.