Missouri Driving Laws 2026: Speed Limits, DWI BAC and Missouri DOR Road Rules for the Permit Test

What is the speed limit in Missouri in a city when no sign is posted? Missouri sets 25 mph in any city, town, or village, 60 mph on most non-urban roads, and 70 mph on rural interstates through August 27, 2026; the rural interstate and freeway maximum becomes 75 mph effective August 28, 2026. Missouri DWI: 0.08% for adults, 0.02% for under-21. Missouri headlights: required 30 minutes after sunset and when windshield wipers are in use. Missouri's Siddens Bening Hands Free Law applies to all drivers: while operating a vehicle, drivers may not physically hold or support an electronic communication device or manually type, send, or read text-based messages, subject to statutory exceptions.

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1. Missouri Speed Limits: 25 in Every City, 2026 Rural Interstate Change & What "Lettered Road" Means

What is the speed limit in a residential area in Missouri, and what happens if no sign is posted? Missouri's current Driver Guide lists the following maximum speeds unless a posted speed limit directs otherwise:

Roadway	Maximum Speed
Rural interstates and freeways	70 mph through August 27, 2026; 75 mph effective August 28, 2026
Rural expressways	65 mph
Interstate highways, freeways, or expressways within urbanized areas	60 mph
All other roads and highways not located in an urbanized area	60 mph
Lettered roads	55 mph
Any city, town, or village unless posted otherwise	25 mph

Key test point: Missouri interstate highways have a 40 mph minimum under normal roadway conditions. The posted maximum is not always a safe speed; drivers must slow down when road, weather, visibility, pedestrian, bicycle, or traffic conditions require it.

Missouri work zones: Obey posted work-zone speed limits and signs. A speeding or qualifying passing violation in a construction or work zone carries an additional $250 fine for a first offense and $300 for a second or subsequent offense when a highway worker is present and the required warning signs are posted.

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2. Who Has Right-of-Way in Missouri? Funeral Processions & 4-Way Stops

Who has the right-of-way at a 4-way stop in Missouri? The driver who reaches the intersection first may proceed after stopping; when vehicles arrive at the same time, yield to the vehicle on your right. Missouri law sets who must yield and does not give any driver an absolute right-of-way.

Missouri funeral procession right-of-way law: Pedestrians and other vehicles must yield to an organized funeral procession. Once the funeral lead vehicle lawfully enters an intersection, vehicles in the procession may follow through, but the procession must yield to approaching emergency vehicles and obey law-enforcement directions. Drivers outside the procession may not drive between its moving vehicles or pass a procession vehicle except where a passing lane is specifically provided.

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3. Missouri Turn Laws: Signal 100 Feet, Right-on-Red Rules & U-Turn Restrictions

When must you signal before a turn in Missouri, can you turn right on red, and where are U-turns prohibited?

• Signal at least 100 feet before a turn.
• After a complete stop at a red light, you may turn right when the way is clear of pedestrians and traffic unless a No Right Turn On Red sign is posted.
• Make a U-turn only when it is safe. Do not make one on a curve or near the crest of a hill when other drivers may not be able to see you.
• Do not make a U-turn where a No U-Turn sign is posted or at an intersection controlled by a traffic signal or police officer. Some Missouri cities and towns also prohibit U-turns.
• When there are no signs or lane markings controlling a turn, turn from the lane closest to the direction you are going and enter the closest appropriate lane.

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4. Missouri Lane Usage Rules: Center Turn Lane, Yellow Lines and Lane Change Laws

What do solid versus broken yellow lines mean in Missouri, and when can you use the center turn lane?

Marking	What It Means in Missouri
Broken yellow center line	Passing permitted when safe, used on most two-lane Missouri highways
Solid yellow line (your side)	No passing on your side
Double solid yellow lines	No passing in either direction
Center turn lane (two-way left turn lane)	Enter only when preparing to slow down or stop before making a left turn from the main roadway; do not use it as a travel lane for more than 500 feet, and do not use it to enter the roadway from a side street
Solid white line	Edge of travel lane or pedestrian crossing; do not cross unnecessarily
Broken white line	Lane boundary, may change lanes when safe

On Missouri highways with two or more lanes moving in the same direction, vehicles must generally use the right-hand lane except when overtaking and passing, preparing for a proper left turn, or when traffic markings, signs, or signals direct otherwise.

5. Passing Laws in Missouri: No-Passing Zones, Right-Side Passing & Bicycle Clearance

When is passing legal in Missouri, and where is passing prohibited?

• Use the left lane to pass another vehicle. You may pass on the right when the vehicle ahead is making a left turn, but never use the shoulder or unpaved part of the highway to pass.
• Do not pass where there is a solid yellow line on your side or where you cannot see far enough ahead to complete the pass safely.
• Do not pass when your view is obstructed while approaching within 100 feet of a bridge, viaduct, or tunnel, or when approaching within 100 feet of an intersection or railroad grade crossing.
• When passing another vehicle, do not exceed the speed limit. Return to the right lane only after you can see the passed vehicle in your rearview mirror and the lane change is safe.
• When overtaking a bicycle traveling in the same direction, Missouri law requires a safe passing distance and clearance until you are safely past the bicycle.

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6. Missouri Following Distance Laws: Safe-and-Prudent Rule & 3-Second Guide

How much distance should you keep between your vehicle and the car ahead on Missouri highways?

• Missouri law requires a following distance that is reasonably safe and prudent for your speed, traffic, and roadway conditions.
• The Missouri Driver Guide recommends the 3-second rule as a way to measure a safe following distance under normal conditions.
• Increase your following distance when conditions reduce traction or visibility, when traffic is heavy, or when you need more room to stop safely.
• When another driver is following too closely, keep a steady speed and, when safe, move right or allow the driver to pass rather than braking suddenly.

7. Missouri School Bus Law: Stop Requirements, 4-Lane Exception & Move Over

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

School Buses

• When a school bus stops with flashing red lights and an extended stop arm, all traffic in both directions must stop on undivided roads.
• You do not have to stop when traveling in the opposite direction from a school bus on a highway with separate roadways divided by a median, or when traveling in the opposite direction on a highway containing four or more lanes.
• You also do not have to stop when a school bus is stopped in a loading zone where students are not permitted to cross the roadway.
• You must remain stopped until the bus resumes motion or the bus driver signals you to proceed.
• Passing a stopped school bus in violation of Missouri law is a class A misdemeanor. Through August 27, 2026, a court may order a driver-license suspension of 90 days for a first offense or 120 days for a second or subsequent offense. Effective August 28, 2026, Missouri sets a fine of $500-$1,000 for a first offense, $1,000-$2,000 for a second offense within five years, and $1,500-$3,000 for a third or subsequent offense within five years; a first-offense license suspension is discretionary, while a second offense within five years carries a 90-day suspension and a third or subsequent offense within five years carries a 180-day suspension.
• Railroad crossings: School buses generally must stop within 15-50 feet of railroad grade crossings before proceeding with due caution, subject to statutory exceptions such as specifically exempted crossings or a traffic-control signal giving a positive indication to proceed.

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 (Missouri): When approaching a stationary vehicle displaying red/red-and-blue lights or amber/amber-and-white lights, move into a lane not adjacent to the stationary vehicle when the road has at least four lanes with at least two moving in your direction and the lane change can be made safely. If a lane change is unsafe or impossible, proceed with caution and reduce to a safe speed for road conditions.

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8. Missouri DWI Laws: 0.08% BAC, 90-Day 1st Suspension & Abuse and Lose Under-21 Rule

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

Rule	Detail
Legal BAC limit (adults 21+)	0.08% Blood Alcohol Content (BAC)
Legal BAC limit (under 21)	0.02%, Missouri "Abuse and Lose" zero tolerance for drivers under 21
Legal BAC limit (CDL holders)	0.04% while operating a commercial vehicle
Implied consent law	Driving in Missouri = implied consent to breath, blood, or urine testing. Refusal: 1-year revocation; officer will take license immediately and issue 15-day notice
First DWI or excessive-BAC conviction — driving privilege	A first conviction results in a 90-day suspension; a Restricted Driving Privilege may be available. If the driver has an alcohol- or drug-related conviction or suspension within the prior five years, the driving privilege is revoked for 1 year.
Alcohol consumption while driving	Missouri law prohibits a driver from consuming an alcoholic beverage while operating a moving motor vehicle on a public thoroughfare; the offense is an infraction.
Drugs	Missouri DWI law applies when a person operates a vehicle while in an intoxicated condition, including impairment involving drugs; BAC percentage limits do not define drug impairment.

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9. Missouri Seat Belt Law: Child Restraint by Age, Weight & Height

Who must wear a seat belt in Missouri, and what child restraint is required by age, weight, and height? Missouri's general seat-belt law is secondary enforcement: a person may not be stopped solely to determine compliance with the adult seat-belt requirement.

Rule	Detail
Adult seat-belt requirement	The driver and front-seat occupants of passenger cars must wear properly adjusted and fastened seat belts, subject to statutory exceptions.
Intermediate-license passengers	All passengers accompanying an intermediate driver-license holder must be properly restrained.
Children under 4	Must be secured in an appropriate child passenger restraint system regardless of weight.
Children under 40 pounds	Must be secured in an appropriate child passenger restraint system regardless of age.
Age 4 to under 8, 40 to under 80 pounds, and under 4 feet 9 inches	Must be secured in an appropriate child passenger restraint system or booster seat.
At least 80 pounds or more than 4 feet 9 inches tall	May be secured by a vehicle safety belt or an appropriate booster seat.
Children under 16	The driver is responsible for securing the child as required by Missouri's child-restraint law.

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10. Where You Cant Park in Missouri: Hydrant Distance, Crosswalk Rules & Handicap Space Fines

How far from a cannot park:fire hydrant must you park in Missouri, 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

• Within 15 feet of a fire hydrant
• Within 20 feet of a crosswalk at an intersection
• Within 30 feet of a stop sign, yield sign, or traffic 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.

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11. Driving in Missouri Ice, Tornadoes & Fog: When to Use Headlights & What Wipers-On Means

Are headlights required when it is raining in Missouri, and what should you do if your car starts to hydroplane? Missouri weather can change fast, especially in the Ozarks and River Valley; these rules tell you exactly how to adjust.

• Headlights required in Missouri any time weather requires windshield wipers (Missouri law) and from hour after sunset to hour before sunrise.
• 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.
• In icy conditions, brake gently well in advance. Start slowing earlier than normal. Leave extra following distance.
• 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.

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12. Missouri Points System: 4-Point Advisory, 8-Point Suspension & Revocation Thresholds

How many points cause a Missouri license suspension or revocation?

Point Rule	Missouri Consequence
4 points in 12 months	The Department sends a point-accumulation advisory.
8 or more points in 18 months	Driving privilege is suspended: 30 days for a first suspension, 60 days for a second, and 90 days for a third or subsequent suspension.
12 or more points in 12 months	Driving privilege is revoked for 1 year.
18 or more points in 24 months	Driving privilege is revoked for 1 year.
24 or more points in 36 months	Driving privilege is revoked for 1 year.
Examples	The current Missouri Driver Guide lists speeding as 3 points and careless and imprudent driving as 4 points under state law.

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13. Missouri Headlight Laws: Wiper Rule, Nighttime Use & High-Beam Distances

When are headlights required in Missouri, and when must you dim high beams?

Condition	Missouri Headlight Rule
Night	Use headlights from 30 minutes after sunset until 30 minutes before sunrise.
Weather requiring windshield wipers	Headlights must be used.
Dim for oncoming traffic	Use low beams when within 500 feet of an oncoming vehicle.
Dim when following	Use low beams when following another vehicle within 300 feet.
Fog	Use low beams; high beams can reflect back and reduce visibility.

14. Night Driving in Missouri: I-70, Rural Roads & Why 350 Feet Isnt Far Enough

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

Rule	Detail
Overdriving your headlights	Never 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 night	Even at the posted limit, reduced visibility means you need more time to react, slow down
Increase following distance	Increase following distance beyond the normal 3-second guide when reduced visibility or road conditions require more space
Watch for pedestrians & cyclists	They are much harder to see at night, especially away from lit areas
Avoid looking directly at oncoming lights	Look toward the right edge of the road to avoid being blinded by oncoming high beams
Stay alert for wildlife	Deer and other animals are most active at dawn and dusk, especially on rural Missouri highways through the Ozarks and other rural areas
Keep windshield clean	A dirty windshield causes glare at night and significantly reduces visibility

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15. Missouri Hands-Free Law: Cell Phone, Texting & Electronic Device Rules

Is it legal to hold or text on a phone while driving in Missouri? The Siddens Bening Hands Free Law applies to drivers of noncommercial and commercial motor vehicles on highways and property open to public vehicular traffic.

Rule	Current Missouri Requirement
Holding a device	While operating a vehicle, drivers may not physically hold or support an electronic communication device with any part of the body.
Text-based messages	Drivers may not manually type, write, send, or read text-based messages while operating a vehicle.
Video	Recording, posting, sending, broadcasting, or watching video is prohibited while operating a vehicle, subject to statutory exceptions.
Hands-free use	Voice-operated or hands-free calling and voice-to-text are allowed when used within the law; navigation and audio functions are also allowed.
Lawfully stopped or parked	The statute includes exceptions for specified uses, including use when lawfully stopped or parked.
Traffic stop solely for this law	Missouri law states that a person shall not be stopped, inspected, or detained solely for a violation of the hands-free section.

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16. Missouri Railroad Crossing Rules: Stop Distance, Required Stops and Safety Steps

How far from a railroad track must you stop in Missouri, and which vehicles must always stop?

• Stop no closer than 15 feet and no farther than 50 feet from the nearest rail when signals are active or a train is approaching
• Never drive around lowered crossing gates, it is illegal and deadly
• School buses and certain passenger-for-hire and hazardous-material vehicles must stop within 15 to 50 feet of most railroad grade crossings, subject to statutory exceptions
• Do not stop on the tracks, if traffic ahead is backed up, wait before the crossing until you can clear the tracks completely
• After a train passes, wait for signals to fully stop and gates to fully rise before crossing

Key test point: Missouri has numerous at-grade railroad crossings throughout the state. The 15-to-50-foot stop zone is directly tested on the Missouri written exam.

17. How to Drive a Roundabout in Missouri: Yield on Entry, Lane Choice & When to Signal Out

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

Rule	Detail
Who has right-of-way	Vehicles already inside the roundabout always have right-of-way. Entering drivers must yield.
Direction of travel	Always travel counterclockwise (to the right) around the central island
Entering a roundabout	Slow down, yield to circulating traffic, and enter when there is a safe gap
Lane selection, single lane	Follow the directional signs and road markings for your intended exit
Lane selection, multi-lane	Choose 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 inside	Never stop inside a roundabout unless to avoid a collision, keep moving at a slow, steady speed
Large vehicles	Trucks and buses may use the mountable apron (raised inner ring) to navigate, give them extra space
Pedestrians & cyclists	Yield 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.

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