Question 1

Under Idaho's "basic rule" law, can a driver be in violation even while driving under the posted speed limit?

Accepted Answer

Yes -- driving too slowly for conditions and impeding traffic flow is itself a violation — Idaho's basic rule law means driving too slowly for existing conditions and impeding the safe flow of traffic is a violation, even if you're under the posted speed limit.

Question 2

Unless posted otherwise, what is Idaho's default maximum speed on a state highway?

Accepted Answer

65 mph — Idaho's default maximum speeds are 75 mph on interstates (80 mph where posted), 65 mph on state highways (70 mph where posted), and 35 mph in a residential, business, or urban district.

Question 3

What speed limit applies to a heavy vehicle (5+ axles, over 26,000 pounds) on an urban interstate in Idaho, regardless of the posted limit?

Accepted Answer

Capped at 65 mph, regardless of the posted limit — Vehicles with 5 or more axles weighing over 26,000 pounds can't exceed 10 mph less than the posted speed on non-urban interstates, and are capped at 65 mph on urban interstates.

Question 4

When is an Idaho driver excused from stopping for a school bus loading or unloading students?

Accepted Answer

When traveling opposite the bus on a highway with 4+ lanes and 2+ lanes going each direction — Drivers must stop for a school bus loading or unloading students, but don't have to stop if traveling opposite the bus on a highway with 4 or more lanes and 2 or more lanes going in each direction.

Question 5

At an Idaho four-way stop, who yields if two vehicles arrive at the same time?

Accepted Answer

The vehicle on the left yields to the vehicle on the right — At a four-way stop or uncontrolled intersection, the first vehicle to arrive has the right-of-way; if two arrive at the same time, the vehicle on the left yields to the vehicle on the right.

Question 6

What should an Idaho driver do when an emergency vehicle approaches with its siren on?

Accepted Answer

Pull to the nearest right edge or curb, clear of any intersection, and remain stopped until it passes or an officer waves them through — When an emergency vehicle approaches, drivers must pull to the nearest edge or curb on the right, clear of any intersection, and remain stopped until it has passed or an officer waves them through.

Question 7

Up to what age does Idaho law require a child in a non-commercial vehicle to be secured in an approved car safety seat?

Accepted Answer

6 years old or younger — Idaho law requires children 6 years old or younger in a non-commercial vehicle to be properly secured in an approved child car safety seat.

Question 8

Where must an unsealed alcoholic beverage be kept in an Idaho vehicle with no trunk?

Accepted Answer

Behind the last upright seat — Idaho's open container law requires unsealed alcohol to be kept in the trunk, or behind the last upright seat if the vehicle has no trunk.

Question 9

How many auxiliary lights are allowed in front of an Idaho vehicle?

Accepted Answer

No more than two — Idaho bans red or blue emergency-style lights on non-emergency vehicles, sirens/bells/whistles, more than two spotlights, and more than two auxiliary lights in front.

Question 10

How close to a fire hydrant does Idaho law prohibit parking?

Accepted Answer

Within 15 feet — Idaho bans parking within 15 feet of a fire hydrant, 20 feet of a crosswalk, 30 feet of a stop/yield sign or signal, 50 feet of railroad tracks, 20 feet of a fire station driveway, and in bike lanes.

Idaho: Rules of the Road Questions

1. Under Idaho's "basic rule" law, can a driver be in violation even while driving under the posted speed limit?

2. Unless posted otherwise, what is Idaho's default maximum speed on a state highway?

3. What speed limit applies to a heavy vehicle (5+ axles, over 26,000 pounds) on an urban interstate in Idaho, regardless of the posted limit?

4. When is an Idaho driver excused from stopping for a school bus loading or unloading students?

5. At an Idaho four-way stop, who yields if two vehicles arrive at the same time?

6. What should an Idaho driver do when an emergency vehicle approaches with its siren on?

7. Up to what age does Idaho law require a child in a non-commercial vehicle to be secured in an approved car safety seat?

8. Where must an unsealed alcoholic beverage be kept in an Idaho vehicle with no trunk?

9. How many auxiliary lights are allowed in front of an Idaho vehicle?

10. How close to a fire hydrant does Idaho law prohibit parking?

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