Missouri DOR Study Guide 2026 — Key Numbers, Signs, DWI, Right of Way

📖 Missouri DOR Study Guide

Everything important from the Missouri Driver Guide handbook — organized for the exam

⭐

Memorize these numbers first. Missouri test questions are frequently built around specific distances, speeds, BAC levels, and time periods. These come up constantly.

Speed Limits

HIGH FREQUENCY

Posted

School zone — obey posted limit when lights flash or children present

25 mph

Residential & business districts

55 mph

Lettered (county) roads

70 mph

Freeways (70 mph rural interstate)

+$250

Minimum additional fine in work zones — $250 first offense, $300 second or subsequent

15 mph

Mobile home parks

📏

Critical Distances & Clearances

HIGH FREQUENCY

15 ft

Minimum from fire hydrant

20 ft

Minimum from crosswalk at intersection

30 ft

Minimum from stop sign, yield sign, or traffic signal

50 ft

Minimum from railroad crossing

20 ft

Minimum from crosswalk at intersection or fire station driveway

12 in

Maximum from curb when parallel parking

100 ft

Signal before turning

500 ft

Dim high beams for oncoming traffic

300 ft

Dim high beams when following another vehicle

Safe dist.

Clearance when passing a bicyclist (no fixed statewide ft requirement)

🍺

DWI & Alcohol Numbers

ALWAYS ON TEST

.08%

Legal BAC limit for drivers 21+

.02%

BAC limit for drivers under 21 (near-zero tolerance)

6 months

Max jail for 1st DWI — Class B misdemeanor (BAC under .15%)

1 year

Max jail for 1st DWI (BAC .15% or higher)

Forever

DWI stays on your Missouri driving record

5 years

Missouri DWI lookback period for prior offender status

🎓

Teen / GDL Numbers

ON EXAM

182 days

Minimum permit hold before getting a license

40 hrs

Required supervised behind-the-wheel driving (10 at night)

10 hrs

Of the 40 required hours — must be nighttime driving

Max non-family passengers under 19 during first 6 months of intermediate license

1 AM–5 AM

Curfew every day — intermediate license holders may not drive alone during these hours

25+ / 21+

Supervisor age: 25+ (with parental permission) if driver is under 16; any licensed 21+ if driver is 16 or older

Not req.

Driver's education — Missouri does NOT require it (40 hrs = supervised driving, not class)

⏱️

Following Distance & Time Rules

ON EXAM

3 sec

Minimum following distance under ideal conditions

4–6 sec

Following distance in rain, night, or towing

300 ft

Stopping distance at 55–60 mph (reaction + braking)

5 sec

How long a text takes your eyes off the road

🛡️

Insurance & Financial Responsibility

ON EXAM

25/50/25

Missouri minimum liability: $25k/person · $50k/accident · $25k property

At-Fault

Missouri is an at-fault state — the driver who causes the crash pays

8 pts

License suspension threshold (in 18 months)

12 pts

License revocation threshold (in 12 months)

🚦

Road signs are tested heavily. Know each sign's shape, color, and meaning. The real test often shows a sign description and asks what it means.

🔴

Sign Shapes — Each Shape Has One Meaning

ALWAYS TESTED

Shape	Meaning	Example
Octagon (8-sided)	STOP — always and only	Stop sign
Triangle (pointing down)	YIELD — give right of way	Yield sign
Diamond	WARNING — hazard ahead	Curve, pedestrian, deer
Pentagon (5-sided)	SCHOOL ZONE	School crossing
Pennant (triangle right)	NO PASSING ZONE	No-passing pennant
Round (circle)	RAILROAD CROSSING advance warning	RR crossing sign
Rectangle (vertical)	REGULATORY — rules you must follow	Speed limit, turn restrictions
Rectangle (horizontal)	GUIDE or INFORMATION	Street name, mile marker
X-shaped crossbuck	RAILROAD CROSSING — treat like yield	Railroad crossbuck

🎨

Sign Colors — Color Tells You the Category

ALWAYS TESTED

Color	Category	What It Means
Red	Regulatory — STOP / PROHIBIT	Stop, yield, do not enter, wrong way, no-turn circles
Yellow	WARNING	General hazard warnings — curves, hills, intersections, animals
Orange	WORK ZONE / CONSTRUCTION	Construction ahead, road crew, additional fines apply
Green	GUIDE / DIRECTIONAL	Highway exits, distances, direction, mile markers
Blue	SERVICES	Gas, food, lodging, hospital, rest area
Brown	RECREATION / CULTURAL	Parks, campgrounds, historical sites, scenic areas
White	REGULATORY	Speed limits, lane rules, turn restrictions
Fluorescent Yellow-Green	WARNING — pedestrian / school / bike	School zones, crosswalks, bike lanes

⚠️

Signs That Are Frequently Confused

TRICKY

No Passing Pennant vs. No U-Turn: The pennant (pointing right) = no passing. A circle with a slash over a U-turn arrow = no U-turn. Very different.

Crossbuck (RR) vs. Stop Sign: The crossbuck (white X) = yield/slow down and check. Only stop if a train is coming. The octagon = always stop.

Divided Highway Begins vs. Ends: Begins = two arrows pointing apart (median starts). Ends = two arrows merging together (median ends — expect two-way traffic).

Merge vs. Lane Ends: Merge = two roads joining (both cars adjust). Lane Ends = one lane disappears — that driver must yield and merge.

Red Circle with Slash: Always means that action is PROHIBITED. No left turn, no trucks, no bicycles — whatever is inside the circle is forbidden.

⭐

Right of way is the #1 failure topic on the Missouri DOR test. Master every scenario below — these questions will be on your exam.

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The Core Right-of-Way Rules

MOST TESTED

Uncontrolled intersection — arrive at same time: Yield to the driver on your RIGHT. This is the most tested right-of-way rule.

Left turn at green light: You must always yield to oncoming traffic AND pedestrians — even with a green light. A green light is permission to go, not a guarantee of right of way.

Pedestrians in a crosswalk: Always yield. Stop and wait until the pedestrian has completely crossed — not just stepped back. This includes jaywalkers in many situations.

Blind pedestrian (white cane / guide dog): Absolute right of way — you must stop regardless of where they are crossing.

Four-way stop: First to arrive goes first. Simultaneous arrival = yield to the driver on your right. Straight traffic before turning traffic if both arrive at same time from opposite directions.

Emergency vehicles (lights + siren): Pull to the right edge of the road and stop. Clear intersections first — never stop IN an intersection.

Entering from driveway / private road: Always yield to all traffic on the public road — you have no right of way entering from private property.

Roundabout: Vehicles inside the roundabout always have right of way. Entering traffic must yield. When exiting, yield to pedestrians at the crosswalk.

Merging onto a highway: Traffic already on the highway has right of way. The merging vehicle must yield and find a safe gap.

Non-functioning traffic signal: Treat as an all-way stop. All drivers stop, yield, and take turns.

💡

Right-of-Way Scenarios That Trick People

TRICKY

Yellow light: It does NOT mean speed up. If you can stop safely, you must. Proceed only if stopping would be unsafe (you're too close to stop).

Already in intersection when light turns red: Complete the turn — you are committed. Other traffic must wait for you to clear.

Backing out of a driveway: The reversing vehicle always yields to street traffic. You have no right of way in reverse.

Bus re-entering traffic: Missouri requires you to yield to a bus with its left-turn signal on pulling away from a stop — when safe to do so.

Right turn on red: Legal ONLY after a complete stop and yielding to ALL traffic and pedestrians. Rolling right on red is illegal.

Right on red: Legal after a complete stop and yielding to traffic and pedestrians — unless a "No Right Turn On Red" sign is posted.

🚥

Traffic Signal Meanings

ALWAYS TESTED

Signal	What You Must Do
Solid GREEN	Proceed — but yield to traffic already in intersection
Solid YELLOW	Prepare to stop if safe; proceed only if stopping would be dangerous
Solid RED	Stop completely; may turn right on red after stop and yield (unless posted)
GREEN ARROW	Protected turn — cross traffic is stopped. You may turn without yielding.
YELLOW ARROW	Protected turn is ending — prepare to yield or stop
Flashing YELLOW ARROW	Unprotected turn — you MAY turn but MUST yield to oncoming and pedestrians
Flashing RED	Treat exactly like a STOP sign — stop, yield, proceed when safe
Flashing YELLOW	Caution — slow down and proceed carefully. Do not need to stop.
RED + GREEN ARROW	Stop for through traffic; turn in direction of arrow only
Signal NOT working	Treat as ALL-WAY STOP — all traffic stops

🛣️

Lane Markings — Know Each One

ON EXAM

Broken yellow center line: Passing is permitted from your side when it is safe.

Solid yellow line on your side: No passing from your side of the road.

Double solid yellow: No passing in either direction.

White lines: Separate traffic going in the same direction. Broken = lane change ok. Solid = discouraged (but not always illegal).

Yellow lines: Separate traffic going in opposite directions.

Center left-turn lane (two-way turn lane): Use ONLY to prepare for and make a left turn. Never use as a travel or passing lane.

Yellow X over a lane: Lane is CLOSED — move to a lane with a green arrow immediately.

White stop line: Stop your front bumper at or behind this line at intersections and crosswalks.

↔️

Safe Lane Changing Procedure

STEP BY STEP

Check your mirrors — rearview and side mirror on the side you're moving to

Signal your intent — Missouri law requires signaling at least 100 feet before any turn or lane change. Signal before you slow down, not after.

Look over your shoulder — physically check the blind spot. Mirrors cannot see everything.

Change lanes gradually — smooth and controlled, not jerky

Cancel signal and adjust speed to match the lane's traffic flow

🚨

DWI questions appear on virtually every Missouri DOR test. Know the BAC levels, implied consent law, and penalties. Missouri uses "DWI" (Driving While Intoxicated), not "DUI."

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DWI Laws — The Numbers You Must Know

ALWAYS ON TEST

Situation	Consequence
BAC of .08%+ (driver 21+)	DWI — criminal charge
BAC of .15%+	Aggravated DWI — enhanced penalties, mandatory IID
BAC of .02%+ (under 21)	Zero-tolerance — license suspension
Refusing chemical test	1-year revocation of driving privilege (Implied Consent Law)
First DWI (BAC .08%+)	Class B misdemeanor — up to 6 months jail, up to $500 fine, 90-day suspension
First DWI (BAC .15% or higher)	Aggravated DWI — enhanced penalties, mandatory IID
2nd DWI within 5 years	Class A misdemeanor or felony — longer revocation, mandatory jail
3rd DWI offense	Up to 4 years jail, up to $5,000 fine — 10-year license denial
DWI causing injury or death	Up to 2–7 years prison, up to $5,000 fine, 5-year license loss

💡

Critical DWI Facts to Remember

TESTED

Implied Consent: By driving in Missouri you are deemed to have consented to alcohol/drug testing if lawfully requested. Refusing results in a 1-year revocation of your driving privilege — independent of any DWI charge.

Only TIME removes alcohol: Coffee, food, and cold showers do NOT sober you up. Missouri materials state alcohol leaves your body at a fixed rate — only time lowers your BAC.

Impairment can happen below .08%: You can still face DWI consequences if you are impaired. Alcohol and drugs affect judgment, reaction time, and coordination before reaching the legal BAC limit.

0.02% for under 21: Missouri's zero-tolerance law means drivers under 21 are subject to a 0.02% BAC standard. Even one drink can put you over the limit.

Alcohol in the vehicle: Missouri bans consuming alcohol while driving. Local open-container ordinances may also apply — check your city or county rules.

Hands-free law: Missouri's Siddens Bening Hands Free Law prohibits physically holding or supporting a phone while driving statewide. Violations are an infraction — officers can cite you for it.

Marijuana and DWI: Missouri approved medical marijuana in 2018 and recreational marijuana in November 2022. Driving while impaired by marijuana or any other drug can still lead to a DWI charge — legalization does not permit impaired driving.

🚌

School bus rules are heavily tested — especially the divided highway exception. Many people fail this question. Learn the exact rule.

🚌

School Bus Stopping Rules

HEAVILY TESTED

Two-lane road / undivided road: ALL traffic in BOTH directions must stop when a school bus has flashing red lights and the stop arm is extended. No exceptions.

Divided highway with PHYSICAL barrier (median/curb): Only traffic going the SAME direction as the bus must stop. Traffic on the other side may proceed. This is the exception that tricks people.

Highway with four or more lanes: Opposite-direction traffic does NOT have to stop. This is the exception that surprises people — the guide grants the exception for any road with 4+ lanes, not just physically divided highways.

When may you proceed: You must remain stopped until the bus moves or the bus driver signals you to proceed. Then proceed with caution and watch for children walking along the side of the road.

Third exception — school loading zone: No stop required when the school bus is stopped in a school loading zone where students are not permitted to cross the roadway.

Yellow lights = warning: Yellow flashing = bus is about to stop. Slow down immediately and prepare to stop. Do not try to pass before it stops.

Penalty: Significant fine + possible license suspension. Second offense can result in vehicle immobilization. It is one of the most serious traffic violations.

School buses must stop at ALL railroad crossings — regardless of whether warning signals are active. This is federal law.

Speed Laws — What You Must Know

ON EVERY TEST

Basic Speed Law: Drive at a speed that is reasonable and proper for existing conditions — even if that means going below the posted limit. Rain, fog, heavy traffic, school zones all require reduced speed.

Posted limits are MAXIMUMS: You may never legally exceed a posted limit, regardless of conditions, traffic, or what other drivers are doing.

Minimum speed law: Do not drive so slowly that you impede or block the normal flow of traffic. Driving too slowly is also illegal.

Construction zone fines: Missouri adds a minimum additional fine of $250 for a first work-zone speeding offense, and $300 for a second or subsequent offense, on top of any regular fine.

"Over-driving your headlights": At night, never drive faster than you can stop within the distance your headlights illuminate. Driving faster than this is reckless.

↔️

Following Distance — The 3-Second Rule

TESTED

Pick a fixed object — a sign, overpass, or lane marking ahead

When the car ahead passes it, start counting: "one-one-thousand, two-one-thousand, three-one-thousand"

If you pass the object before 3 seconds — you are too close. Back off.

💡 When to increase beyond 3 seconds

Rain, snow, ice, or fog → 4–6 seconds minimum
Driving at night → 4 seconds
Following a large truck or motorcycle → 4+ seconds
Towing a trailer → 4–6 seconds
Driving at highway speeds → increase distance proportionally

📐

Passing Rules

TESTED

✓

You MAY pass when: There is a broken yellow line on your side, you have sufficient sight distance, and there is no sign or condition prohibiting passing.

✗

NEVER pass: On hills or curves where you cannot see oncoming traffic; within 100 feet of a railroad crossing, bridge, or intersection; in no-passing zones (solid yellow on your side); near school buses; when it would require going off the road.

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When it is safe to return: You may move back into your original lane when both headlights of the passed vehicle are visible in your rearview mirror.

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Passing on the right: Legal when the vehicle ahead is making a left turn and there is a safe lane to the right, or on a multi-lane road.

🅿️

Parking Clearance Requirements

TESTED

Location	Minimum Clearance
Fire hydrant	15 feet
Stop sign, traffic light, flashing signal	30 feet
Railroad crossing (nearest rail)	50 feet
Driveway entrance (public or private)	Not in front of — always prohibited
School crossing or driveway (school hours)	20 feet
Inside an intersection or on a crosswalk	Never — always illegal
Handicapped space (without placard)	Never park here
Crosswalk at intersection	20 feet
No Stopping zone	Never stop here, for any reason
No Parking zone	No parking — may stop to load/unload

⛰️

Parking on Hills — Wheel Position

TRICK QUESTION

💡

The rule: always turn wheels so that if the car rolls, it rolls away from traffic or is caught by the curb.

Situation	Turn Wheels	Why
Facing DOWNHILL, WITH curb	RIGHT (into curb)	Car rolls into curb and stops
Facing DOWNHILL, NO curb	RIGHT (away from road)	Car rolls away from traffic
Facing UPHILL, WITH curb	LEFT (away from curb)	Car rolls back, caught by curb
Facing UPHILL, NO curb	RIGHT (away from road)	Car rolls away from traffic

💡 Memory trick

Going downhill with a curb = wheels RIGHT into the curb
Going uphill with a curb = wheels LEFT, away from curb (tire catches it when rolling back)
No curb either way = wheels RIGHT, away from road

🎓

GDL questions appear on many tests, especially for younger test-takers. Know the three phases, the restrictions in each, and the specific numbers.

🎓

Missouri Graduated Driver Licensing (GDL) — 3 Phases

ON EXAM

Phase 1 — Instruction Permit

→

Minimum age: 15 years old — no driver's education required to get a permit

→

Must hold permit for at least 182 days (6 months) before applying for a license

→

Supervisor: under 16 → must be 25+ licensed 3+ years (or parent/grandparent/instructor); age 16+ → must be 21+ with valid license

→

Must complete 40 hours of supervised driving, including 10 hours at night (RSMo 302.178)

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Supervisor must sit in the front passenger seat at all times

Phase 2 — Intermediate License

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Minimum age: 16 years old (after holding instruction permit for at least 182 days with no traffic violations in the last 6 months)

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Curfew: 1:00 a.m. – 5:00 a.m. every day — no weekend variation (may drive during curfew for school, work, or emergency with adult 21+)

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Intermediate license held until age 18, when you may apply for a full driver license

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Hands-free law applies to ALL drivers in Missouri — no handheld devices

→

Violations during probation can lead to suspension or extension of restrictions

Phase 3 — Full License

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Full License at 18 — requires valid intermediate license, no alcohol-related offenses or traffic convictions in past 12 months

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0.02% BAC limit still applies until age 21; 0.08% limit for 21+

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Missouri driver's license valid for 6 years (under 75); shorter renewal periods for older drivers

🛡️

Emergency Situations — What to Do

TESTED

💨

Tire blowout: Hold the wheel FIRMLY. Ease off gas (don't brake suddenly). Let the car slow naturally. Then gently steer to safety. Sudden braking causes a spin.

💧

Hydroplaning: Ease off gas, hold wheel steady, avoid braking. Let tires re-contact the road. Don't jerk the wheel or brake hard.

🔥

Engine fire: Pull over immediately, turn off engine, get EVERYONE out and move far away (100+ feet). Call 911. Never open the hood.

⚡

Brakes fail: Pump brakes rapidly to build pressure. Downshift to use engine braking. Use parking brake carefully (gradually). Steer to safety.

🌊

Accelerator sticks: Shift to NEUTRAL immediately. Apply brakes. Pull over. Turn engine off.

🌀

Vehicle skids: Ease off gas and brakes. Steer in the direction you want the front to go (into the skid). Do not overcorrect.

🚂

Stalled on railroad tracks: Get EVERYONE out IMMEDIATELY. Move away at a 45° angle in the direction the train is coming — so debris flies away from you. Call 911 and the railroad ENS number.

🌫️

Driving in fog: Use LOW beams (high beams reflect off fog and blind you). Slow significantly. Use fog lights if available. Consider pulling over.

😴

Drowsy driving: Only cure = sleep. Pull over and rest. Coffee, window down, and music are NOT effective solutions. Drowsy driving equals drunk driving in impairment level.

❄️

Stranded in a blizzard: Stay in the vehicle (it's shelter and visible). Run engine briefly for heat with window cracked to prevent CO poisoning. Signal for help with hazards.

🧠

Defensive Driving Principles

ESSENTIAL

Scan ahead: Look 12–15 seconds ahead (about a block in the city, ¼ mile on highways) to anticipate hazards early.

Keep an escape route: Always know where you could go if the car ahead stopped suddenly.

Bridges freeze first: Cold air circulates above AND below a bridge. Bridges ice before road surface — always treat them as potentially icy in winter.

Head-on collision approaching: Brake hard and steer RIGHT — even off the road. A head-on crash at speed is almost always fatal; going off-road is survivable.

Road rage: Never engage, retaliate, or make eye contact. Don't respond with gestures. Slow down, create distance. Report to 911 if dangerous.

Front wheel off pavement: Don't jerk the wheel — it can roll the car. Ease off gas, brake gently, and gradually steer back. Hold on tight.

🔧

Vehicle Equipment Requirements

TESTED

Equipment	Requirement
Headlights (on)	½ hour after sunset until ½ hour before sunrise; any time wipers are running due to weather; when visibility is reduced
High beams (dim)	Within 500 ft of oncoming vehicle; within 300 ft when following another vehicle
Horn	Must be in functioning, working order and audible to other drivers and pedestrians
Turn signals	Must be in functioning order; signal at least 100 feet before turning or changing lanes
Tinted windows	Prohibited on front windshield; side/rear windows have limits
TVs / video screens visible to driver	Prohibited while vehicle is in motion (navigation is excepted)
Muffler	Must prevent excessive or unusual noise
Brakes	Required on all four wheels; must stop within a safe distance
Wipers	Must adequately clean the windshield when used
Tail lights / rear reflector	At least one red tail light visible from 500 feet
Tires	Must have adequate tread depth and be in safe condition
Hazard lights	For use when parked/stopped in an emergency — not while driving normally
Seat belts	Required for driver and front seat occupants; ALL passengers must be restrained when riding with an intermediate license holder

💡

Headlight Rules That Are Tested

TESTED

Wipers = headlights: Missouri law requires headlights ON any time your windshield wipers are running due to weather — even in daytime.

Parking lights ≠ headlights: Parking lights are for indicating a parked vehicle only. They are NOT bright enough for driving. Always use headlights when moving.

Fog lights vs. high beams: In fog, use LOW beams or fog lights. High beams reflect off water particles in fog and reduce YOUR visibility.

Night driving — "drive in your headlights": Never drive faster than you can stop within the distance lit by your headlights. This is called over-driving your headlights and is dangerous.

⚡

Before the Test — What to Do

PREPARATION

Take the DOR Exam Simulator at least 5 times and score 90%+ consistently. Don't go in when you're scoring 80% — aim higher than the minimum.

Use the "Weak Spots" mode the night before. Every question you got wrong — review those explanations until you understand WHY, not just what the answer is.

Memorize the Key Numbers tab — BAC limits, distances, suspension periods, speed limits. These are direct exam fodder.

Get a good night's sleep. Drowsy test-taking impairs recall just like drowsy driving impairs reaction time.

Bring required documents: Proof of identity, Social Security number, proof of Missouri residency, and proof of insurance or enrollment in driver's ed if under 18.

🧠

During the Test — How to Answer

STRATEGY

The safest answer is usually correct. When in doubt, pick the option that is most cautious, most yields, or stops the most. Missouri tests reward safe, defensive driving choices.

Watch for "NEVER" and "ALWAYS" options. These are sometimes traps — but in Missouri driving law, there actually are many absolute rules (ALWAYS stop for school bus, NEVER pass on a hill crest, etc.).

"All of the above" is very often the correct answer on Missouri DOR tests — especially for questions about DWI charges, suspension triggers, and violations.

Read every word. Test questions often hinge on words like "divided" vs. "undivided," "physical barrier" vs. "painted lines," or "first offense" vs. "second offense."

Refuse = worse than fail. For DWI questions: refusing a chemical test always has a longer suspension than failing it. This surprises many people.

The real test has 25 questions — you need 80% (20 out of 25) to pass. Questions cover road signs, traffic laws, and safe driving practices. Don't panic over 1–2 hard questions.

📋

Recommended Study Order

YOUR PLAN

Read Key Numbers tab — memorize every distance, speed, and BAC number

Read Right of Way + DWI tabs — the #1 and #2 failure topics

Read Road Signs + Signals tabs — shapes, colors, and signal meanings

Read School Buses + Parking tabs — specific rules with specific numbers

Take the Full Practice Bank — all 258 questions to identify weak spots

Use Weak Spots mode — drill every question you got wrong until you nail it

Run the DOR Exam Simulator 3–5 times — pass consistently with 90%+ before going in

Night before: Re-read the Key Numbers tab + Test-Day Tips tab. Good sleep. You've got this. ✅