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

What is the default speed limit in Hawaii when no sign is posted on a city street? Hawaii sets 25 mph in school zones, 35 mph on highways without a posted limit, and 60 mph on rural highways. The permit knowledge test is 30 questions. DUI threshold is 0.08% for adults and 0.02% for under-21. Hawaii requires headlights from 30 minutes after sunset to 30 minutes before sunrise and whenever visibility is under 500 feet. Cell phone use while driving requires hands-free.

1. Speed Limits in Hawaii

Hawaiis speed laws are built around a foundational Basic Speed Law: you must never drive faster than is reasonable and safe for existing conditions, regardless of what the posted sign says. On top of that, posted signs establish the legal maximum. Heres how Hawaiis speed requirements break down:

Key test point: In Hawaii, excessive speed for conditions is identified as the major cause of most crashes. You can receive a citation for driving too fast for conditions even if you are under the posted limit. Hawaiis weather, sudden tropical downpours, low-cloud fog on volcano roads, flash floods, means conditions change rapidly and the Basic Speed Law applies constantly.

2. Right-of-Way: Who Goes First

Hawaiis knowledge test hits right-of-way consistently, pedestrian yielding and intersection priority rules are tested every time. In a state where tourist pedestrians outnumber locals on some Waikiki blocks, yielding correctly is not just a test question; it is a daily reality.

4-way stop (all arrive at once)

Driver to the right

4-way stop (one arrives first)

Driver who arrived first

Roundabout / traffic circle

Vehicles already inside the circle

Emergency vehicles (lights/siren)

Emergency vehicle, pull to the right and stop

Pedestrians in crosswalk

Pedestrians always

T-intersection (no signs)

Through road traffic; drivers on the dead-end must yield

Yield sign

Cross traffic and pedestrians always

Merging onto a highway

Traffic already on the highway

3. Turns & Signal Laws

Hawaii requires a turn signal for at least 100 feet before every turn or lane change, and warns that the signal alone does not give you the right to make the move. You must also confirm it is safe. Right turns on red are generally permitted after a full stop unless a sign prohibits it:

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

When posted, you must wait for a green light before turning right.

Left turn on red

Only allowed from a one-way street onto another one-way street, after a full stop.

Left turn from two-way street

Start from the left lane; end in the left lane of the cross street.

Right turn

Stay as close to the right curb as possible; end in the right lane.

U-turns

Legal where not prohibited by a sign; must not interfere with traffic. Illegal in Hawaii where signs prohibit it, where it cannot be completed safely, or where it would interfere with other traffic. Always confirm visibility and clearance before executing any U-turn.

4. Lane Rules & Line Markings

On Hawaiis H-1, H-2, and H-3 freeways and its network of two-lane highways across four islands, lane rules matter. One Hawaii-specific detail: red lane reflectors mean you are traveling the wrong way in a traffic lane, a real hazard on some of Oahus reversible lanes. Heres the full breakdown:

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 line

Do not cross; marks the edge of the road or a lane that should not be changed.

Solid yellow line (your side)

No passing allowed.

Broken yellow line

Passing allowed when safe.

Solid + Broken yellow centerline

Passing allowed only on the broken-line side.

5. Passing Another Vehicle

On Hawaiis narrow two-lane roads, the Hana Highway on Maui, Chain of Craters Road on the Big Island, Kamehameha Highway on Oahus North Shore, passing is frequently impossible and always demands caution. Heres what Hawaii law requires:

• 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

Hawaiis sudden tropical downpours, sun glare off the Pacific, and slow-moving tourist traffic all affect how much following distance you need. The 3-second rule is your baseline under normal conditions, and the handbook specifically calls out distracted drivers as a reason to increase your buffer to 34 seconds.

7. School Buses & Emergency Vehicles

Hawaiis school bus stop rules and the requirement to yield to emergency vehicles are directly tested on the knowledge exam. On Oahus congested roads, knowing when and how to stop for a school bus, and when the divided highway exception applies, is essential.

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.
• 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.
• Illegally passing a stopped school bus in Hawaii is a serious moving violation resulting in points against your operators license and significant fines, and could result in revocation of driving privileges.
• 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 (Hawaii): When passing any vehicle stopped on the highway, emergency vehicles, tow trucks, or any disabled vehicle, move one lane away from the stopped vehicle when safely possible. If lane change is not possible, reduce speed and proceed with caution.

8. Driving Under the Influence in Hawaii

Hawaiis alcohol law has a graduated BAC system: at 0.05%0.08% you are considered impaired; at 0.08% and above you are legally under the influence. Refusing a chemical test does not protect you, it can result in license revocation for 1, 2, or 4 years depending on your prior alcohol enforcement contacts, and you can still be charged with driving under the influence even after refusing.

9. Seat Belts & Child Seats

Hawaii law is explicit: all front-seat occupants must use seat belts by law. Children under 4 must be in an approved child restraint, and children ages 4 through 17 must be belted in the rear seats. A crash at just 12 mph can be fatal without a belt, and at 30 mph, occupants are thrown forward with deadly force.

10. Where You Cannot Park

Hawaii adds a unique parking rule worth memorizing: your vehicle must be parked no more than 12 inches (30 cm) from the curb. Blocking fire hydrant access, crosswalk sight lines, or driveways is prohibited. Heres the full list of prohibited parking locations tested on the Hawaii knowledge exam:

• 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.

11. Driving in Bad Weather

Hawaiis weather hazards are unlike any other state. Volcanic smog ("vog") from Kilauea reduces visibility on the Big Island. Flash floods can sweep vehicles off roads in minutes on Oahus windward side. Tropical downpours arrive without warning. And fog can appear suddenly on Haleakala, Saddle Road, and Pali Highway. Heres how the handbook says to handle each:

• In heavy rain, turn on low beam headlights so others can see you. If visibility drops so you cannot see clearly, pull completely off the road and stop.
• 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.

12. Points & License Suspensions

Hawaiis Division of Motor Vehicles tracks all moving violations on your driving record. Convictions in Hawaii and other states are recorded. Accumulating violations, especially alcohol-related, racing, or reckless driving offenses, can result in revocation of your operators license. Heres how Hawaiis violation consequences break down:

Note: Hawaii records all moving violation convictions on your drivers record. Prior DUI offenses, including those from other states, are considered when determining revocation periods for new offenses. The Division of Motor Vehicles and the courts administer penalties separately.

13. Headlight Rules

Hawaiis headlight rules are straightforward: keep low beams on except when high beams are needed to see ahead, and dim immediately when another vehicle approaches or when following. On unlit rural roads on Maui, the Big Island, and Kauai, proper headlight use is critical.

Key test point: Hawaiis handbook does not specify the 500/300-foot numbers explicitly but is clear: do not use high beams when approaching or following any other vehicle. In fog, always switch to low beams, high beams reflect off moisture and reduce your vision. Red lane reflectors mean you are going the wrong way; blue or white reflectors confirm correct direction.

14. Night Driving

Hawaiis rural roads, especially on Maui, Kauai, and the Big Island, are unlit and can be pitch black at night. The handbook is direct: reduce your speed so you can stop within the distance you can see ahead. Free-range animals, including horses and cattle on parts of the Big Island and Molokai, cross roads without warning after dark.

15. Cell Phones & Distracted Driving

Hawaiis handbook devotes significant attention to distractions, noting that even hands-free phone conversations take attention away from driving. The state prohibits handheld device use while driving, and the handbook specifically recommends pulling over to the side of the road in a safe place before taking any call.

Key test point: Hawaiis handbook emphasizes that even hands-free conversations are distracting. The recommended rule: if you need to talk on a cell phone, pull over to the side of the road in a safe place until you are finished. Headsets covering both ears are specifically prohibited, you must be able to hear emergency sounds.

16. Railroad Crossings

Hawaii has limited freight rail operations, primarily on Oahu, but the rules for railroad crossings are tested on the knowledge exam. The required stop distance and which vehicles must always stop regardless of signals are standard test questions.

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

Roundabouts appear at intersections across Hawaiis islands, particularly on Oahus suburban corridors and on resort areas of Maui. The Hawaii knowledge test covers them directly. The rule no one should miss: vehicles entering the roundabout must yield to vehicles already circulating inside, every time.

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.