New Hampshire Driving Laws 2026: Speed Limits, DWI BAC and NH DMV Road Rules for the Permit Test

What is the speed limit in New Hampshire on a road with no posted limit? New Hampshire sets 30 mph in urban areas, 35 mph in rural residential areas, 55 mph on most roads, and 65 mph on specified interstate sections. New Hampshire DWI: 0.08% for adults, 0.02% for under-21. New Hampshire headlights are required from 1/2 hour after sunset to 1/2 hour before sunrise and when rain, snow, or fog prevents persons and vehicles from being clearly discernible at 1,000 feet ahead. The point system has three separate tracks: one for under-18, one for 18-20, and one for 21-plus.

1. NH Speed Limits: 30 Business Districts, 35 Rural Residential & School Zones 10 MPH Below Posted

What is the speed limit in a residential area in New Hampshire, and what happens if no sign is posted? Speed limits are set by state law; when no sign is visible, these default limits apply:

Key test point: New Hampshire posted school zones use 10 mph below the usual posted limit from 45 minutes before school opens until opening and from school closing until 45 minutes after. The statutory limit on an unimproved rural highway is 45 mph. Speeding in a state or interstate construction or maintenance zone manned by workers carries a $250-$500 fine.

2. NH Right-of-Way: 4-Way Stops, Funeral Processions & Pedestrian Priority

Who has the right-of-way at a 4-way stop in New Hampshire, and when must drivers yield to pedestrians? At an uncontrolled intersection, the driver on the left yields to the driver on the right. A driver must also yield to a pedestrian lawfully within a crosswalk. New Hampshire funeral processions have the right-of-way after the lead vehicle lawfully enters an intersection, and other drivers may not cut between procession vehicles or enter the procession path at that intersection.

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

Yield to pedestrians lawfully within the crosswalk

T-intersection (no signs)

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

Yield sign

Yield to traffic posing an immediate hazard and pedestrians lawfully within the crosswalk

Merging onto a highway

Traffic already on the highway

3. NH Turn Signal Law: 100 Feet Before Turns, 200 Feet Return Distance When Passing

Can you turn right on red in New Hampshire, and how far in advance must you signal a turn? New Hampshire requires a turn signal continuously during at least the last 100 feet before turning. A right turn on a steady red signal or red arrow is allowed after a full stop unless a sign prohibits the turn; drivers must yield to pedestrians lawfully within an adjacent crosswalk and other traffic lawfully using the intersection.

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

A left turn on red is not generally permitted unless a sign or other lawful traffic-control indication specifically permits the movement.

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 business districts in New Hampshire unless at a designated intersection.

4. NH Lane Rules: Keep Right, Left-Lane Impeding Rule & Center Turn Lanes

When can you use the center turn lane in New Hampshire, and when must slower traffic keep right? A vehicle moving below the normal speed of traffic must use the right-hand lane or stay as close as practicable to the right edge, except when passing or preparing for a left turn. On a multilane roadway, a driver must not continuously occupy the left lane when doing so impedes traffic at or below the posted speed limit unless conditions make left-lane use reasonable and prudent.

Center turn lane (CTSL)

Used for preparing for or making a left turn from or onto the roadway, or for a permitted U-turn or other lawful movement; not for ordinary through travel.

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 in New Hampshire: Wait for Their Headlights in Your Mirror Before Returning

When is it illegal to pass another vehicle in New Hampshire, and how close to an intersection can you pass? Passing is one of the most dangerous maneuvers on the road, New Hampshire law sets strict distance and visibility rules:

• 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. NH Following Distance: 4-Second Minimum Plus Extra in Poor Conditions

What is the safe following distance in New Hampshire, and how does weather change it? The New Hampshire Driver’s Manual recommends a minimum following distance of at least 4 seconds between your vehicle and the vehicle ahead under normal conditions. Increase the gap when traffic, speed, light, weather, or road conditions require more stopping and reaction space.

7. NH School Bus Law: 25-Foot Stop Rule & Move Over Requirements

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

School Buses

• When a school bus stops to receive or discharge school children, drivers meeting or overtaking the bus as required by New Hampshire law must stop at least 25 feet away and remain stopped until the bus resumes motion or its flashing red lights cease.
• On a divided highway with separate roadways, a driver meeting a school bus traveling in the opposite direction on the other roadway is not required to stop.
• 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.
• Penalty for violating the school-bus stop rule: $150 plus penalty assessment for a first offense; a subsequent offense carries a $250-$1,000 fine and may result in a 30-day license suspension.
• Railroad crossings: A school bus carrying any school child must stop within 15-50 feet of the nearest rail before crossing, unless a statutory exemption applies.

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 (New Hampshire): When approaching an emergency scene, traffic stop, or a stopped or standing vehicle displaying warning signals, maintain a reduced speed and, when practical, give a wide berth without endangering oncoming traffic. Vacate any lane that is wholly or partially blocked as soon as possible.

8. NH DWI Laws: 180-Day Refusal Suspension Generally Runs Consecutively

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

9. NH Seat Belt & Child Restraint Law: Under 18, Under 7 and Rear-Facing Under 2

Who must wear a seat belt in New Hampshire, and when is a child restraint required? New Hampshire requires drivers under 18 and passengers under 18 to be properly restrained. A child under age 7 must use an approved child restraint unless the child is at least 57 inches tall, and a child under age 2 must be secured in a rear-facing child restraint. New Hampshire does not impose a general seat-belt requirement on occupants age 18 or older in standard passenger vehicles.

10. NH Parking Rules: 15-Foot Hydrant, 20-Foot Crosswalk & 50-Foot Railroad Distances

How far from a fire hydrant must you park in New Hampshire, and is it legal to park on a bridge? New Hampshire law sets specific stopping, standing, and parking restrictions. Know where you cannot park:

• 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 20 feet of a fire-station driveway entrance, or within 75 feet on the opposite side when properly signposted
• 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 NH Ice, White Mountains & Black Ice: Speed & Headlight Rules

Are headlights required when it is raining in New Hampshire, and what should you do if your car starts to hydroplane? New Hampshire weather can change fast, especially in the White Mountains and northern parts of the state; these rules tell you exactly how to adjust.

• Headlights required in New Hampshire from 1/2 hour after sunset to 1/2 hour before sunrise, and whenever rain, snow, or fog prevents persons and vehicles from being clearly discernible at 1,000 feet ahead.
• 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. NH Demerit Points: Age-Based Suspension Thresholds

How many points does a speeding conviction add to a New Hampshire license, and when can points trigger a suspension? New Hampshire uses age-based demerit-point thresholds measured over one, two, and three consecutive calendar years.

Note: For suspension purposes, a driver who has accumulated at least 3 points may qualify for a 3-point reduction by completing an approved driver improvement or driver attitude course. No more than one 3-point reduction is allowed during any 3 complete consecutive calendar years.

13. New Hampshire Headlight Law: Nighttime & 1,000-Foot Visibility Rule

When are headlights required in New Hampshire? State law requires headlights from 1/2 hour after sunset to 1/2 hour before sunrise and whenever rain, snow, or fog interferes with the view so that persons and vehicles are not clearly discernible at 1,000 feet ahead.

Key test point: New Hampshire’s statutory visibility trigger is 1,000 feet in rain, snow, or fog, and the nighttime requirement begins 1/2 hour after sunset. The New Hampshire Driver’s Manual directs drivers to dim high beams for approaching traffic and use low beams when following another vehicle.

14. Night Driving in New Hampshire: Deer Season, Mountain Roads & Low Beam Limits

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

15. NH Hands-Free Law: Handheld Devices Banned While Driving

Is it legal to use a handheld phone while driving in New Hampshire? No. A driver may not use a hand-held mobile electronic device while the vehicle is moving or temporarily halted in traffic. The law provides limited exceptions, including emergency reporting and certain hands-free uses; drivers under 18 are subject to stricter restrictions.

Key test point: The New Hampshire handheld-device ban applies while a vehicle is moving and while it is temporarily halted in traffic. A driver who has legally pulled to the side of or off the road and remains stationary is outside the statutory definition of driving for this rule.

16. New Hampshire Railroad Crossings: 15-to-50-Foot Stop Rule & Required Stops

How far from the tracks must you stop at a railroad crossing in New Hampshire, and what vehicles must always stop even when no train is coming? Railroad crossing rules are tested on the New Hampshire knowledge exam; know exactly when to stop and how far back.

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. New Hampshire Roundabouts: Yield on Entry, Lane Selection & How to Signal Your Exit

New Hampshire has been installing roundabouts at intersections throughout the state, particularly in the Seacoast region, Manchester, and along US-1 and NH-101. The DMV tests them. Entering traffic yields to vehicles already circulating inside 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.