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Alabama Road Rules

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

What is the speed limit in Alabama when no sign is posted, and what does the state actually test you on? Alabama uses 25 mph as the default for business and residential areas and 65 mph on rural interstates. The permit knowledge test is 30 questions; you need a 80% to pass. Key rules that trip people up: Alabama requires headlights any time visibility drops below 500 feet, the DUI limit is 0.08% for adults and 0.02% for drivers under 21, and the Move Over law requires reducing speed when approaching any stopped emergency vehicle on a highway.


Table of Contents

☰ TABLE OF CONTENTS

  1. Alabama Speed Limits
  2. Right-of-Way Rules in Alabama
  3. Intersection and Turn Laws in Alabama
  4. Alabama Lane Usage Rules
  5. Passing Laws in Alabama
  6. Following Distance in Alabama
  7. Alabama School Bus Laws
  8. DUI and Impaired Driving Laws in Alabama
  9. Alabama Seat Belt and Child Restraint Laws
  10. Parking Rules in Alabama
  11. Driving in Alabama Weather
  12. Alabama License Points and Suspensions
  13. Headlight Laws in Alabama
  14. Night Driving in Alabama
  15. Alabama Cell Phone and Distracted Driving Laws
  16. Railroad Crossings in Alabama
  17. Alabama Roundabout Rules

1. Speed Limits in Alabama

What is the speed limit in an urban district in Alabama, and what happens if no sign is posted? Speed limits are set by state law; when no sign is visible, these statutory limits apply:

LocationDefault Speed Limit
Urban district streets30 mph
Unpaved roads35 mph
County paved roads (unless posted)45 mph
Other locations55 mph
Interstate highways (where posted)70 mph
School zones (when active)As posted, indicated on lighted sign with flashing amber lights

Key test point: Speed limits are the maximum under ideal conditions. You must slow down in rain, fog, heavy traffic, or at night even if you are under the posted limit. This is called the Basic Speed Law.


2. Right-of-Way: Who Goes First

Who has the right-of-way at a 4-way stop in Alabama, and do pedestrians always go first? Right-of-way questions are among the most frequently tested; remember: right-of-way is something you give, never something you take.

4-Way Stop Sign, Alabama right-of-way rules
4-way stop (all arrive at once)
Driver to the right
4-Way Stop Sign, Alabama right-of-way rules
4-way stop (one arrives first)
Driver who arrived first
Roundabout Traffic Circle Sign, Alabama roundabout rules
Roundabout / traffic circle
Vehicles already inside the circle
Emergency Vehicle Warning Sign, Alabama school bus and emergency vehicle laws
Emergency vehicles (lights/siren)
Emergency vehicle, pull to the right and stop
Pedestrian Crosswalk Lines, Alabama pedestrian right-of-way
Pedestrians in crosswalk
Pedestrians always
T-Intersection Warning Sign, Alabama intersection right-of-way
T-intersection (no signs)
Through road traffic; drivers on the dead-end must yield
Yield Sign, Alabama right-of-way rules
Yield sign
Cross traffic and pedestrians always
Merging Traffic Warning Sign, Alabama merging and lane change rules
Merging onto a highway
Traffic already on the highway

3. Turns & Intersection Rules

Can you turn right on red in Alabama, and how far in advance must you signal a turn? Intersection and turn rules are heavily tested, including when left turns on red are legal and exactly how far in advance you must signal.

Right Turn Signal Arrow, Alabama turn signal laws
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 Sign, Alabama red light turn rules
No right turn on red
When posted, you must wait for a green light before turning right.
No Left Turn on Red Sign, Alabama red light turn rules
Left turn on red
Only allowed from a one-way street onto another one-way street, after a full stop.
Turn Left Only Lane Sign, Alabama lane usage rules
Left turn from two-way street
Start from the left lane; end in the left lane of the cross street.
Turn Right Only Lane Sign, Alabama lane usage rules
Right turn
Stay as close to the right curb as possible; end in the right lane.
No U-Turn Sign, Alabama U-turn laws
U-turns
Legal where not prohibited by a sign; must not interfere with traffic. Illegal in business districts in Alabama unless at a designated intersection.

4. Lane Rules & Line Markings

When can you use the center turn lane in Alabama, and what do solid versus broken yellow lines mean for passing? Lane rules determine where you drive and when you can cross a line, all commonly tested on the knowledge exam.

Center Turn Lane Pavement Marking, Alabama center turn lane rules
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 Lane Line, Alabama lane marking rules
Solid white line
Do not cross; marks the edge of the road or a lane that should not be changed.
Double Solid Yellow Centerline, Alabama no-passing zone lane markings
Solid yellow line (your side)
No passing allowed.
Single Broken Yellow Centerline, Alabama passing zone lane markings
Broken yellow line
Passing allowed when safe.
Solid and Broken Yellow Centerline, Alabama passing lane markings
Solid + Broken yellow centerline
Passing allowed only on the broken-line side.

5. Passing Another Vehicle

When is it illegal to pass another vehicle in Alabama, and how close to an intersection can you pass? Passing is one of the most dangerous maneuvers on the road, Alabama law sets strict distance and visibility rules:

  • Only pass on the left, using the oncoming lane, when it is safe and legal.
  • Do not pass within 100 feet of an intersection, railroad crossing, bridge, or curve where your view is limited. Look for the No Passing Zone pennant sign.
  • The vehicle being passed must not speed up while you are overtaking.
  • Return to your lane before coming within 200 feet of oncoming traffic.
  • Never pass a stopped school bus with flashing red lights, this applies in both directions on undivided roads.
  • You may pass on the right only when the vehicle ahead is turning left and there is a usable lane to the right.

6. Following Distance

What is the safe following distance in Alabama, and how does weather change it? Alabama uses the 3-second rule as the minimum under normal conditions: pick a fixed object ahead, and when the car in front passes it, you should reach it no sooner than 3 seconds later.

ConditionRecommended Following Distance
Normal conditions3 seconds
Rain or wet roads45 seconds
Following a large truck or motorcycle4 seconds minimum
Ice or snow810 seconds
At night or in fog4+ seconds

7. School Buses & Emergency Vehicles

Do you have to stop for a school bus on a divided highway in Alabama, and what is the penalty for passing one illegally? These are two of the most frequently tested topics on the Alabama driver knowledge exam.

School Buses

School Bus Stop Arm, Alabama school bus stop arm law

  • When a school bus stops with flashing red lights and an extended stop arm, all traffic in both directions must stop on undivided roads.
  • On roads with a true median or physical barrier, only traffic behind the bus must stop, oncoming traffic may proceed.
  • A center turn lane does not count as a divider. On 4+ lane roads without a raised median or barrier, all directions must stop.
  • You must remain stopped until the red lights stop flashing and the stop arm is retracted.
  • Passing a stopped school bus illegally in Alabama carries 5 points against your license and possible suspension.
  • Railroad crossings: School buses must stop at ALL railroad crossings, with or without passengers, even if no lights are flashing and no train is visible. This is a frequently tested rule.

Emergency Vehicles

  • When you see or hear an emergency vehicle (police, fire, ambulance) with lights or siren: pull to the right edge of the road and stop. Do not block intersections.
  • Move Over Law (Alabama): When passing a stopped emergency vehicle on a multi-lane road, you must move one lane away if possible. If you cannot move over, slow to a speed at least 15 mph less than the posted speed limit.

8. DUI Laws & BAC Limits

What is the legal BAC limit in Alabama for drivers under 21, and can you refuse a breathalyzer? Alabama DUI laws cover every driver category with different limits and strict implied consent penalties.

RuleDetail
Legal BAC limit (adults 21+)0.08% Blood Alcohol Content (BAC)
Legal BAC limit (under 21)0.02%, Alabama has a zero-tolerance policy for underage drivers
Legal BAC limit (CDL holders)0.04% while operating a commercial vehicle
Implied consent lawBy driving in Alabama, you automatically consent to BAC testing. Refusal results in driver license suspension.
DUI first offense penaltiesFine $600$2,100, up to 1 year in jail, license suspension 90 days, possible ignition interlock device
Open container lawIllegal to have an open alcoholic beverage in the passenger area of a vehicle
DrugsDriving under the influence of any impairing substance (prescription, OTC, or illegal) is a DUI offense in Alabama

9. Seat Belts & Child Seats

Who gets the ticket if a passenger is not wearing a seat belt in Alabama, the driver or the passenger? Alabama requires all occupants to be restrained regardless of seating position.

RuleDetail
Front seat belt requirementAll front-seat occupants must wear a seat belt, driver and passengers
Rear seat belt requirementAll rear-seat passengers must be buckled
Infants under 1 year or under 20 lbsMust be in an infant-only or convertible seat used in the rear-facing position
Children under 5 years or under 40 lbsMust use a convertible seat in forward position or a forward-facing seat
Children under 6 yearsMust use a booster seat
Children through age 15Must be restrained by a seat belt
Who is liableThe driver is legally responsible if any passenger through age 15 is unrestrained, points assessed in addition to fine
Penalty, first offenseFine of $25; subsequent offenses $50+; points added to driving record

10. Where You Cannot Park

How far from a fire hydrant must you park in Alabama, and is it legal to park on a bridge? These distance rules are frequently tested and easy to miss if you have not studied the specific numbers. Know where you cannot park:

  • Within 15 feet of a fire hydrant
  • Within 20 feet of a crosswalk at an uncontrolled intersection
  • Within 30 feet of any flashing beacon, stop sign, or traffic control signal
  • Within 50 feet of a railroad crossing
  • On a sidewalk, in front of a driveway, or on a bridge
  • In a no-parking zone or alongside a curb painted yellow or red
  • Double parking (alongside a vehicle already parked at the curb)
  • Headed downhill: turn wheels toward the curb. Headed uphill with a curb: turn wheels away from curb. Uphill without a curb: turn wheels toward the shoulder.

11. Driving in Bad Weather

Are headlights required when it is raining in Alabama, and what should you do if your car starts to hydroplane? Alabama weather can bring sudden downpours and winter ice, especially along the Tennessee River valley and Gulf Coast regions; these rules tell you exactly how to adjust.

  • Headlights required in Alabama whenever windshield wipers are in use due to rain, sleet, or snow. Note: intermittent wiper use does not require headlights.
  • In heavy fog, use low beams, high beams reflect off fog and reduce visibility.
  • If you start to hydroplane, ease off the gas gently. Do not brake hard or turn sharply. Hydroplaning begins at speeds as low as 35 mph on wet roads.
  • In icy conditions, brake gently well in advance. On snow or ice it takes three to twelve times as much distance to stop as on dry pavement.
  • If your car goes into a skid, steer in the direction you want the front of the car to go. Do not overcorrect.
  • Never use cruise control on wet, icy, or slippery roads.

12. Points & License Suspensions

How many points does a speeding ticket add to your Alabama license, and at what point do you lose it? Alabama uses a point system tracked over a 2-year period; accumulating too many points triggers suspension by the Alabama Law Enforcement Agency (ALEA).

Points Accumulated (within 2 years)Suspension Length
12-14 points60 days
15-17 points90 days
18-20 points120 days
21-23 points180 days
24+ points365 days
ViolationPoints
DUI / alcohol-related driving offense (not requiring revocation)6 points
Reckless driving or reckless endangerment6 points
Failure to yield right of way5 points
Passing a stopped school bus5 points
Wrong side of road / illegal passing4 points
Speeding 125 mph over limit2 points
Speeding 26+ mph over limit5 points
Following too closely3 points
Failure to signal / incorrect turn signal2 points
Making an improper turn2 points

Note: Points remain on your record for 2 years from date of conviction. You may request an administrative hearing through ALEAs Driver License Services, Montgomery, AL or online at www.AlabamaDL.alea.gov.


13. Headlight Rules

When must you dim your high beams in Alabama, and how far away does an oncoming car need to be? Alabama law specifies exact distances for dimming, and the 500/200-foot rule is one of the most tested questions on the exam.

RuleDetail
When to use headlightsFrom a half-hour after sunset to a half-hour before sunrise, and any time visibility is less than 500 feet due to rain, fog, snow, or dust
Wipers = headlightsAlabama law requires headlights on whenever windshield wipers are in use due to rain, sleet, or snow (intermittent use exempt)
High beams, illumination rangeOn open roads with no oncoming traffic and no vehicle directly ahead; illuminates roadway approximately 350 feet under normal conditions
Dim to low beams, oncoming trafficSwitch to low beams when within 500 feet of an oncoming vehicle
Dim to low beams, followingSwitch to low beams when within 200 feet of a vehicle you are following
Low beams in fogAlways use low beams in fog, high beams reflect off fog and reduce your visibility
Parking lights onlyNot a substitute for headlights, illegal to drive using parking lights only

Key test point: The 500-foot / 200-foot rule is a classic exam question. Oncoming = 500 feet. Following = 200 feet. Dim accordingly.


14. Night Driving

What does "overdriving your headlights" mean in Alabama, and why is it dangerous? Driving at night significantly increases crash risk; these rules cover visibility, speed, and wildlife hazards specific to Alabama roads.

RuleDetail
Overdriving your headlightsNever drive so fast that you cannot stop within the distance your headlights illuminate, this is called overdriving your headlights and is a major cause of night crashes
Reduce speed at nightEven at the posted limit, reduced visibility means you need more time to react, slow down
Increase following distanceUse a minimum 4-second following distance at night instead of the standard 3 seconds
Watch for pedestrians & cyclistsThey are much harder to see at night, especially away from lit areas
Avoid looking directly at oncoming lightsLook toward the right edge of the road to avoid being blinded by oncoming high beams
Stay alert for wildlifeDeer and other animals are most active at dawn and dusk, especially on rural Alabama highways through the Black Belt and Appalachian foothills
Keep windshield cleanA dirty windshield causes glare at night and significantly reduces visibility

15. Cell Phones & Distracted Driving

Is it legal to use your phone while driving in Alabama, and can a cop pull you over just for texting? Alabama prohibits using a wireless device to write, send, or read a text message while operating a motor vehicle, with stricter expectations for all drivers.

RuleDetail
Texting while drivingIllegal for ALL drivers in Alabama, no exceptions. Officers can pull you over solely for texting.
Handheld cell phone useWhen using a cell phone while driving, always prioritize driving. Use hands-free, speaker, or speed dial; place calls when stopped if possible.
School zones, cell phonesAll handheld cell phone use should be avoided in active school zones regardless of driver age
Penalty, first offenseFine of $25
Penalty, second offenseFine of $50
Penalty, third or subsequent offenseFine of $75 plus 2 points on driving record per offense
Other distractionsEating, grooming, adjusting GPS, or anything that takes your eyes off the road can be cited as inattentive driving
Hands-free useBluetooth and hands-free devices are legal and recommended for all drivers

Key test point: Texting while driving is prohibited in Alabama, police do not need another reason to pull you over. This distinction frequently appears on the knowledge exam.


16. Railroad Crossings

How far from the tracks must you stop at a railroad crossing in Alabama, and what vehicles must always stop even when no train is coming? Alabama ranks #13 in the nation for highway-railroad crossing fatalities; know exactly when to stop and how far back.

RuleDetail
When to stopStop when lights are flashing, gates are lowering or down, a train is visible or audible, or a flagman signals you to stop
How far back to stopAt least 15 feet from the nearest rail, never stop on the tracks
When to proceedOnly after the train has completely passed, lights have stopped flashing, and gates are fully raised
Multiple tracksAfter one train passes, check for a second train on adjacent tracks before proceeding
Never race a trainTrains cannot stop quickly, a freight train at 55 mph takes a mile or more to stop (the length of 18 football fields). Never try to beat a train.
Stalled vehicle on tracksGet everyone out immediately and move away from the tracks at an angle in the direction the train is coming from
Parking near crossingsDo not park within 50 feet of a railroad crossing

Key test point: Never drive around or under a lowered crossing gate, it is illegal and extremely dangerous. Wait until gates are fully raised and all tracks are clear.


17. How to Drive a Roundabout

Who has the right-of-way in a roundabout in Alabama, and which direction do you drive? Roundabouts are increasingly common across Alabama and appear on the knowledge exam; the most missed question is about who yields when entering.

RuleDetail
Who has right-of-wayVehicles already inside the roundabout always have right-of-way. Entering drivers must yield.
Direction of travelAlways travel counterclockwise (to the right) around the central island
Entering a roundaboutSlow down, yield to circulating traffic, and enter when there is a safe gap
Lane selection, single laneFollow the directional signs and road markings for your intended exit
Lane selection, multi-laneChoose your lane before entering based on your exit: right lane for right/straight exits, left lane for left turns or U-turns
Do not stop insideNever stop inside a roundabout unless to avoid a collision, keep moving at a slow, steady speed
Large vehiclesTrucks and buses may use the mountable apron (raised inner ring) to navigate, give them extra space
Pedestrians & cyclistsYield to pedestrians in crosswalks when entering and exiting. Watch for cyclists who may ride through the roundabout.

Key test point: The most common wrong answer on roundabout questions is thinking you have right-of-way when entering. You never do, yield to traffic already inside.


SOURCE:ALABAMA DMV INSTRUCTION PERMIT
BY SHORO AI TECHNICAL TEAM | REVIEWED BY A USA CERTIFIED DRIVING INSTRUCTOR
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