U.S. DMV Learner's Permit Test Study Guide

The permit test is a knowledge test (sometimes called a 'written test' even when computerised). It covers four broad areas: traffic signs and pavement markings, rules of the road, vehicle handling and safe driving, and laws specific to your state.[1]

The test format varies by state, but most use 20 to 50 multiple-choice questions with a passing threshold of 80% (sometimes 70% or 85%). Some states (e.g. California) use a touch-screen terminal; others (e.g. Texas) accept online attempts for teen drivers under parent supervision.[2]

The MUTCD defines the colour and shape conventions used on every U.S. road - federal, state, and local. Memorising the colour-shape mapping is the highest-leverage thing you can do for the signs portion.[3]

• Octagon = STOP. Only ever red, only ever 8 sides.
• Inverted triangle = YIELD.
• Pentagon (point up, school colours) = SCHOOL.
• Diamond = WARNING (yellow) or CONSTRUCTION (orange).
• Round = RAILROAD CROSSING ahead.
• Pennant (horizontal triangle) = NO PASSING ZONE.
• Crossbuck (X-shape) = ACTIVE RAILROAD CROSSING.

1. Uncontrolled intersections - yield to traffic on the right.
2. Four-way stops - first to fully stop goes first; ties yield to the right.
3. T-intersections - traffic on the terminating road yields to traffic on the through road.
4. Roundabouts - yield to traffic already in the circle; do not stop unless necessary.
5. Pedestrians - always have right-of-way at marked or unmarked crosswalks. Drivers must stop, not just slow down.
6. Emergency vehicles - pull to the right and stop until the vehicle has passed. Federal Move Over laws apply in all 50 states for emergency vehicles stopped on the shoulder.

• School zones - 15 to 25 mph during posted hours; in many states, posted hours apply only on school days.
• Residential - typically 25 mph by default unless otherwise posted.
• Urban surface streets - 30 to 35 mph default.
• Rural highways - 55 to 70 mph depending on state.
• Interstates - 65 to 80 mph; the highest U.S. speed limit is 85 mph on Texas SH-130.
• Following distance - the 3-second rule (count 'one-thousand-one, one-thousand-two, one-thousand-three' as the vehicle in front passes a fixed point). Add 1 second for each adverse condition (rain, snow, dark, towing).

• Federal default BAC limit for drivers 21+ is 0.08%. Utah uses 0.05% - the lowest of any state.
• All 50 states have zero-tolerance laws for drivers under 21 - typically a BAC limit of 0.01% or 0.02%.
• Commercial drivers (CDL) have a stricter 0.04% federal limit.
• Implied consent - refusing a breathalyser or blood test triggers automatic licence suspension under each state's implied-consent law.
• Marijuana - even in legalised states, driving under the influence of marijuana is a DUI/DWI offence in all 50 states.

When a school bus shows flashing red lights and an extended STOP arm, drivers must stop. The exact rule for divided highways varies, but the 'undivided two-way road' rule is the same in every state:

• Undivided road, both directions - STOP.
• Divided highway with a physical median or barrier - only same-direction traffic must stop.
• Multi-lane road in the same direction - all lanes in the same direction must stop.
• Wait until the red lights stop flashing AND the STOP arm retracts before proceeding.

These are the most-commonly-tested state-level differences - confirm the exact rule in your state's official driver handbook before test day:

• School-zone hours and speed limits (e.g. 25 mph in CA vs. 20 mph in NY).
• Right-turn-on-red rules (e.g. illegal in NYC unless signed; legal in most states unless signed otherwise).
• Cell phone laws - handheld bans in most states; some allow hands-free for adults but not teens.
• Required headlight conditions (some states require lights when wipers are on).
• Move Over speed reduction (in Texas, 20 mph below the limit if you can't move over; in California, slow to 'reasonable speed').

1. Day 1: Read your state's official driver handbook (download free from your state DMV). Skim the chapter on signs first.
2. Day 2: Drill MUTCD signs by colour and shape. Use the reviewer's signs category.
3. Day 3: Right-of-way scenarios - uncontrolled intersections, four-way stops, roundabouts, T-junctions, school buses.
4. Day 4: Speed limits, following distance, and stopping distance under different weather conditions.
5. Day 5: Alcohol, drugs, distracted driving, and your state's specific phone laws.
6. Day 6: Full-length timed practice exam. Mark every uncertain answer.
7. Day 7: Review missed items. Bring required documents (proof of identity, residency, social security, parental consent if under 18) to the DMV.