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Most-missed Alabama DMV rules
These are the numbers and rules that trip up new drivers most often on the real Alabama knowledge test. Every fact below comes from our free Alabama DMV practice test question bank, which has 180 questions across 8 topics.
Speed limits
- Alabama does not set one uniform school-zone number; the manual says drivers must obey whatever speed is posted on the school zone sign, often shown with a flashing light.
- Alabama sets the maximum speed at 70 mph on Interstate highways with four or more lanes.
- Alabama law sets the speed limit at 30 mph in urban districts.
Right of way
- Alabama's right-of-way rule requires the driver approaching from the left to yield to the vehicle approaching from the right.
- The manual states that entering an intersection at an unlawful speed forfeits any right-of-way the driver would otherwise have had.
- Alabama law requires drivers to stop and yield right-of-way to a blind pedestrian using a red-tipped white cane or guide dog at any intersection, not only marked crosswalks.
- Vehicles entering a public street from a private road or driveway must stop and yield to traffic already on the public roadway.
- Drivers must enter roundabouts only through a gap, turning right, and must never turn left to enter.
- The manual instructs drivers never to back up in a roundabout; if you miss your exit, continue around again.
- Roundabout traffic circulates to the right; entering by turning left would put a vehicle directly against the flow of already-circulating traffic.
- A driver turning left must yield to oncoming vehicles that are already in or near the intersection before completing the turn.
- Do not cut through or break up a funeral procession. Slow down, be patient, and let it pass. Cutting between the vehicles is unsafe and often illegal.
- At an uncontrolled intersection, slow down and yield to any car already in the intersection or approaching from your right.
- A left-turning vehicle must yield to oncoming through traffic and to pedestrians. Only turn when the gap is safe.
- When entering a roundabout, yield to traffic already circulating and travel counterclockwise. Exit at your street; do not stop in the middle of the circle.
- At a T-intersection, traffic on the road that ends must yield to traffic on the through road that continues.
- A round green light allows a left turn but does not give you the right of way. Pull into the intersection, yield to oncoming through traffic and pedestrians, then turn when there is a safe gap.
Alcohol and DUI
- For adult non-commercial drivers, .08% BAC or higher is unlawful per se under Alabama's DUI law.
- The manual notes that a BAC of .05% already impairs driving ability, even though the per se legal limit for adults is .08%.
- Commercial motor vehicle operators are held to a stricter .04% BAC unlawful threshold.
- Alabama's zero-tolerance law sets .02% BAC or more as unlawful for drivers under age 21.
- A second DUI conviction within 10 years carries fines of $1,100 to $5,100, mandatory jail time or community service, and a one-year license revocation.
- Alabama's Implied Consent Law provides that any driver who refuses to submit to a chemical breath test when directed by an officer during a DUI arrest will have their license suspended.
- A conviction resulting from a charge involving drinking alcohol combined with driving carries 6 points under Alabama's point system.
Signals and markings
- Even on a green arrow, a driver must yield to other vehicles already lawfully in the intersection.
- Alabama law requires headlights whenever windshield wipers are in continuous use due to rain, sleet, or snow; intermittent use does not trigger the requirement.
- A flashing yellow signal warns drivers to slow down and proceed carefully, unlike a solid red which requires a full stop.
- A solid yellow line on your side of a centerline pair generally means passing is prohibited in that direction, while a broken line permits passing when safe.
- A dashed yellow center line indicates passing is generally permitted when it can be done safely, unlike a solid yellow line.
- A flashing red signal requires a full stop, after which the driver may proceed when it's safe, just as at a stop sign.
- A steady red signal requires a full stop; any right turn on red is only allowed after stopping and when safe and not prohibited by signage.
- The manual instructs drivers not to change lanes once inside a roundabout.
- A flashing yellow signal is a caution indicator, telling drivers to slow down and proceed carefully rather than stop.
- A solid yellow line on a driver's side of the centerline indicates that passing is prohibited from that side of the road.
- A solid yellow line on your side of the centerline indicates that passing is prohibited from that side of the road.
- A flashing yellow signal warns drivers to slow down and proceed carefully, rather than requiring a full stop.
- A driver turning left must yield the right-of-way to all oncoming traffic, including bicyclists, before completing the turn.
- A dashed yellow centerline indicates passing is permitted on that side, provided it can be done safely and there is no oncoming traffic conflict.
- On a plain green light, a left-turning driver must yield to oncoming traffic and pedestrians before completing the turn.
- A flashing red signal functions like a stop sign, requiring drivers to come to a complete stop before proceeding when it is safe.
- A steady yellow light warns that the signal is about to change to red, so drivers should slow and prepare to stop if it is safe to do so.
- A steady yellow light warns the signal is about to turn red; drivers should stop safely if possible or proceed with caution if too close to stop.
- Headlights are legally required not just at night but any time weather conditions significantly reduce visibility.
- The handbook notes posted limits are for ideal conditions, so hazards like hills and curves require a driver to slow below the sign's number.
- The manual requires dimming high beams for oncoming traffic to avoid blinding other drivers.
- Double solid yellow lines indicate that passing is not permitted from either direction on that stretch of road.
- A flashing yellow light means slow down, look, and proceed carefully. It does NOT require a full stop the way a red light or STOP sign does.
- A flashing hand or countdown means do NOT start crossing. If you are already in the crosswalk, keep going and finish crossing safely.
- A steady DON'T WALK hand prohibits starting to cross. Only a WALK signal or walking-person symbol allows you to begin crossing.
- Always signal continuously through a turn or lane change even when you see no other cars, because pedestrians or cyclists may be near. Cancel the signal after you finish.
- A green downward arrow means the lane is open for you to use. A red X above the lane means it is closed and you may not drive in it.
- Double solid yellow lines separate opposing directions and prohibit passing. You may only cross them for a permitted left turn or a legal U-turn into an intersection or driveway.
- A broken yellow line on your side of the lane allows passing when it is safe. The solid line on the opposite side means that direction may not pass.
- White lines separate lanes going the same direction. A solid white line means stay in your lane and avoid changing lanes, while a broken white line lets you change lanes when safe.
- A two-way center left-turn lane is only for preparing to turn left or merging into traffic. You may not use it to drive straight through or to pass.
Safe driving
- The manual states that backing is prohibited on controlled-access highways except for emergency vehicles.
- The manual treats backing across other traffic lanes on any public street as something to be avoided, describing it as essentially never advisable.
- Alabama's child restraint law requires a rear-facing seat until age 1 or 20 pounds, a booster seat until age 6, and a seat belt through age 15.
- Alabama law prohibits placing any sign, poster, or other material on a vehicle window that obstructs the driver's view.
- Since farm tractors typically travel around 25 mph, the speed differential requires extra caution and clearance when passing.
- Because SMV-marked vehicles like tractors move slowly and may turn into fields or driveways, safe practice is to keep distance and watch for signals before passing.
- Drivers are generally taught to keep a multi-second time gap behind the vehicle ahead, increasing it in rain, snow, or fog for adequate stopping distance.
- Endangering a highway worker with no injury results in a fine of $500 to $1,000, rising to as much as $5,000 if great bodily injury results.
- Safe driving practice calls for maintaining enough distance behind the vehicle ahead to react and stop safely if it brakes suddenly.
- Handbooks generally recommend a multi-second following distance that should be increased in bad weather, at higher speeds, or in heavy traffic.
- A time based following distance, counting seconds behind the vehicle ahead, adjusts naturally for speed and is the standard safe driving practice.
- A minimum three-second following gap gives most drivers enough time to react and stop safely under normal conditions.
- On undivided roads, traffic in both directions must stop for a school bus with flashing red lights and an extended stop sign until it resumes moving.
- Drivers must yield to emergency vehicles with active lights and siren by safely moving aside, not stopping in the travel lane.
- Drivers in both directions on an undivided road must stop for a school bus with flashing red lights until it is safe to proceed.
- A 3 to 4 second following distance gives drivers enough time to react and brake safely under normal conditions.
- Wet roads increase stopping distance, so drivers should slow down and add extra space to compensate for reduced traction.
- Passengers under 2 years old must specifically be secured in a rear-facing child restraint system.
- Advisory speed plates on curve warning signs indicate a safe reduced speed that drivers should slow to before entering the curve.
- Work zones require reduced speed and heightened alertness because of workers, equipment, and changing lane patterns.
- A driver overtaking a bicyclist may not turn right unless it can be completed at a safe distance from the cyclist and at a reasonable, proper speed.
- The manual requires dimming to low beams at least 300 feet before overtaking or following another vehicle.
- The manual stresses that no one should ever assume they automatically have the right of way, since other drivers may not yield as expected.
- Work zones are posted at least 10 mph under the normal maximum speed specifically to protect workers and should always be observed.
- The manual teaches drivers not to swerve for animals, since swerving often causes worse crashes than a controlled collision or straight-line braking.
- Safe lane changes require checking mirrors, checking blind spots by looking over the shoulder, and signaling the intended move before moving over.
- Easing off the gas and holding a straight steering direction allows the tires to regain contact with the road surface safely.
- With a tailgater, open up more space in front of you so you can brake gradually instead of suddenly. Do not brake to retaliate and do not race away.
- Strong crosswinds can push your car out of its lane. Hold the wheel firmly with both hands, slow down, and be ready for sudden gusts.
- Do not engage. Avoid eye contact, do not brake in retaliation, let them pass, and leave a safe distance between you and that car.
- Horses and livestock spook easily. Slow down, do not honk or rev your engine, and pass very slowly with plenty of room so you do not startle them.
- When you see a hazard developing ahead, cover the brake and plan an escape route so you can react faster if you have to stop.
- In a skid, ease off the gas or brake and steer gently in the direction you want the front of the car to go. Slamming the brakes makes the skid worse.
Road signs
- A YIELD sign requires slowing down and stopping only if needed to give way to traffic or pedestrians on the intersecting road.
- STOP (R1-1): full stop at the line or crosswalk even when empty; yield, then proceed.
- YIELD (R1-2): give up the right-of-way; slow and be ready to stop.
- DO NOT ENTER (R5-1): entry prohibited; common at freeway off-ramps and one-way streets.
- WRONG WAY (R5-1a): you have entered opposing traffic. Pull over safely and turn around when possible.
- ONE WAY (R6-1): all traffic flows in the arrow's direction.
- NO U-TURN (R3-4): no U-turns at this location. This is not a no-left-turn sign (a different arrow shape) or a no-passing sign (a different shape and color entirely).
- NO LEFT TURN (R3-2). A red circle-and-slash always bans the pictured movement.
- NO RIGHT TURN (R3-1): no right turns, including on red. Going straight is still fine since the sign only bans the right-turn movement; parking is unrelated to this sign.
- White/black = regulatory. Speed Limit is the legal max in ideal conditions; drive slower when conditions are bad (Basic Speed Law).
- KEEP RIGHT (R4-7): a median or obstruction is ahead; keep to its right.
- The crossbuck (R15-1) stands at the tracks and legally works like a YIELD sign: slow, look both ways, be ready to stop.
- Advance warning (W10-1): tracks ahead. Slow down, look, and listen.
- School (S1-1): school zone or crossing. Slow down and watch for children; obey the posted reduced school-zone speed limit, which varies by state.
- Pedestrian crossing (W11-2): crossing ahead; slow and be ready to stop.
- Signal ahead (W3-3): an intersection signal is coming, useful when it hides behind a curve.
- Stop ahead (W3-1): a stop sign is coming (often obscured); start slowing now.
- Merge (W4-1): traffic joins ahead. Adjust speed and position to let them in safely.
- Lane ends (W4-2): merge early; zipper-merge when traffic is heavy.
- Two-way traffic (W6-3): you are leaving a one-way road; keep right.
- Divided highway begins (W6-1): directions separate around a median; always keep right of it.
- Slippery when wet (W8-5): slickest in fresh rain. Slow down, keep distance, steer smoothly.
- Curve (W1-2): slow BEFORE the curve; do not brake in the middle of it.
- Turn (W1-1): sharper than a curve; slow down hard, follow the advisory plaque.
- Winding road (W1-5): consecutive curves; hold a steady lower speed throughout.
- Crossroad (W2-1): an intersection ahead with traffic entering from both sides. Hospital signs are blue with an H.
- NO PASSING ZONE (W14-3): unique pennant shape, posted on the LEFT side, marks where passing becomes illegal.
- Regulatory signs like stop and yield signs establish legally mandated driver actions, distinct from purely informational or warning signage.
- The eight-sided octagon shape is reserved exclusively for Stop signs so it can be recognized even from behind or in poor visibility.
- The five-sided pentagon shape is reserved specifically for school-related warning signs, distinct from all other warning sign shapes.
- The circular yellow sign shape is specifically reserved in the national sign system for advance railroad crossing warnings.
- The triangular shape is uniquely reserved for Yield signs, telling drivers to slow and give way rather than come to a full stop.
- Diamond-shaped yellow signs are standard warning signs alerting drivers to hazards ahead, such as curves, merges, or intersections.
- The manual specifies reduced speed limits apply at locations marked with a School Crossing sign when children are present.
- The triangular yield sign shape signals drivers to give the right-of-way as needed to other traffic or pedestrians.
- The handbook's statutory speeds apply only when no other limit is posted, meaning posted signage takes precedence.
- The handbook instructs drivers at yield signs to slow down and yield to vehicles already in the intersection or approaching.
- The downward-pointing red and white triangle is the standard yield sign, instructing drivers to slow and give way to traffic as needed, stopping only if required for safety.
- The eight-sided shape is reserved exclusively for stop signs so drivers can recognize it even if the sign face is obscured.
- School zone warning signs signal drivers to reduce speed and watch for children, consistent with the guide's emphasis on adjusting speed for conditions and hazards.
- The downward-pointing red-and-white triangle is the standard YIELD sign, requiring drivers to slow and yield to conflicting traffic.
- A downward-pointing triangle is the standard yield sign, instructing drivers to slow and give right of way to conflicting traffic.
- Orange is the standard color used for temporary construction and work zone signs, regardless of the specific shape used.
- The yellow pennant-shaped sign marks the start of a no-passing zone. It usually appears along with a solid yellow line on the pavement.
- A yellow diamond-shaped sign is a WARNING sign, alerting you to a hazard or change ahead such as a curve, intersection, or school, so you slow down.
- A white rectangular sign with black lettering is a REGULATORY sign stating a law you must obey, such as speed or direction of travel.
- An orange sign marks a construction or roadwork zone. Slow down and watch for workers and shifting lanes.
- A blue sign points to driver services such as gas stations, food, lodging, or hospitals.
- A green sign is a GUIDE sign, showing directions, distances, and the names of exits or places.
- A red circle with a slash means the action shown is PROHIBITED, such as no turn or no U-turn at that spot.
Laws and paperwork
- The manual explains that driving on Alabama highways constitutes automatic implied consent to chemical testing for BAC.
- The manual describes a narrower statute focused specifically on texting/emailing/instant messaging while driving, rather than a full handheld device ban.
- The manual frames the broader no-device guidance as part of a parent-teen driving contract, separate from the narrower texting statute.
- Alabama's child restraint requirement covers children through age 15, not just younger children, unlike many states' laws that stop earlier.
- The law applies broadly across cars, pickups, smaller vans, minivans, and SUVs, in both front and back seats.
- The manual specifies the restraint requirement applies to both the front and back seats of covered vehicle types.
- The manual states the knowledge test questions are drawn from the material covered in the manual itself.
- The ALEA manual does not print an explicit passing percentage or exact question count; these should not be assumed without separate confirmation from ALEA.
- The Basic Speed Rule and maximum speed limits appear in Code of Alabama 1975 Section 32-5A-171, subsections 1 through 4.
- Alabama's GDL Stage I Learner License can be issued at age 15 with a 'Y' restriction requiring a supervising licensed driver 21 or older or a certified instructor beside the operator.
- The Stage I Learner License remains valid for four years and is renewable once.
- Alabama's GDL law restricts Stage II licensees from driving between midnight and 6 a.m. except for specific exceptions like accompaniment by a parent or work/school travel.
- Alabama Stage II GDL drivers are restricted to no more than one passenger other than parents, legal guardians, or family members.
- Alabama GDL applicants must complete a minimum of 50 hours of behind-the-wheel practice verified by a parent, grandparent, legal guardian, or certified instructor.
- The Hands-Free Law makes holding a device a violation only when the driver is also observed crossing lanes without signaling, swerving, or otherwise driving improperly.
- Alabama's texting-while-driving law fines $25 for a first offense (adding 2 points), $50 for a second, and $75 for a third or subsequent offense.
Emergencies
- Drivers must yield to emergency vehicles by pulling over and stopping, clearing the intersection first if already inside it.
- Alabama's move-over law requires slowing to at least 15 mph below the posted limit (when that limit is 25 mph or higher) if a lane change isn't possible.
- When the posted limit is 20 mph or less, the required reduction is to at least 10 mph below that limit.
- Rapid brake lights or hazard signals ahead indicate a potential emergency or obstruction, so drivers should slow down and prepare to react safely.
- Standard practice is to safely move to the right and stop, clearing the path for the emergency vehicle to pass.
- Drivers should move to the right and yield the roadway to approaching emergency vehicles with active lights and sirens, stopping if necessary to let them pass safely.
- Move over laws generally require drivers to change lanes away from a stopped emergency or hazard vehicle when safe, or otherwise slow down.
- Drivers must yield to emergency vehicles by pulling to the right and stopping, while making sure not to block the intersection.
- The manual notes you only have right of way if the other vehicle isn't already in the intersection, meaning a vehicle already there should be allowed to clear first.
- Since moose eyes don't glow like deer eyes under headlights, drivers must scan for a large silhouette instead.
- Drivers must yield to emergency vehicles by pulling over to the right and stopping until the vehicle has passed.
- If pulling fully off the road isn't immediately possible, drivers should slow down and use extra caution, but the priority is always to get completely off the pavement as soon as safely possible per Pull Aside, Stay Alive guidance.
- The lane-change requirement applies on interstates and any multi-lane highway with four or more lanes that has at least two lanes traveling in the same direction.
- Steering gently in the direction you want to go while easing off the accelerator helps regain control during a skid.
- Move Over laws require drivers to move over or slow down for any stopped vehicle with warning lights activated, to protect people near the roadway.
- Standard emergency procedure is to move fully onto the shoulder, activate hazard lights, and, if safe, move away from the travel lanes rather than stopping in traffic or continuing to drive on damaged equipment.
- The manual requires drivers to stop for a school bus with flashing red lights from either direction, unless a physical median or barrier separates the roadways.
- The manual notes that if you're already in an intersection when an emergency vehicle approaches, you should proceed through it first before pulling over to stop.
- Drivers must yield the right of way to emergency vehicles by pulling to the right edge of the road and stopping until the emergency vehicle has passed.
- Authorized emergency vehicles may exceed posted limits during emergency duty with signals operating, as long as they do not endanger others.
- Drivers must yield right-of-way to emergency vehicles operating with active lights and siren.
- With a median under 20 feet wide, all lanes in both directions are required to stop for the school bus.
- General emergency guidance for brake failure is to pump the brakes and use engine braking by downshifting to slow down safely.
- The manual specifies the stop requirement does not apply when a physical median or other barrier separates the two roadways, unlike a simple painted line.
- If your car catches fire or smells like burning, pull over, shut off the engine, and get everyone away. Do not open the hot hood, since the rush of air will make the fire flare up.
- If the gas pedal sticks, shift to Neutral to cut the power, then brake and steer to the shoulder. Only turn off the engine after you have fully stopped, so you do not lose power steering.
Signs
Sign shape and color carry meaning before you even read the words. A red octagon always means stop, a red-bordered triangle pointing down means yield, and yellow diamonds warn of a hazard ahead. For every sign image used in our practice test, with the exact meaning and explanation, see the full road sign glossary.
Keep studying
This cheat sheet is a summary, not a substitute for practice. Test yourself with the free Alabama DMV practice test, which explains the reasoning behind every answer, or see Alabama DMV facts and fees before test day.