Idaho Permit Test (ITD Knowledge Test) — All Questions

A red, eight-sided (octagonal) sign means you must:

• a.Slow down and yield
• b.Make a complete stop, then proceed when it is safe✓
• c.Stop only if pedestrians are present
• d.Merge right

The octagon is reserved for STOP; stop at the line or crosswalk, then go when it is safe. (Idaho Driver's Manual, traffic signs)

A yellow, diamond-shaped sign is used to:

• a.Post the speed limit
• b.Mark a highway exit
• c.Warn of a hazard or change in the road ahead✓
• d.Show the way to services

Yellow diamonds are warning signs for curves, merges, crossings, and other conditions ahead. (Idaho Driver's Manual, warning signs)

A flashing red traffic light at an intersection means:

• a.Stop, then proceed when safe as at a stop sign✓
• b.Slow down without stopping
• c.The signal is broken
• d.Go without stopping

A flashing red light has the same meaning as a stop sign: stop, then go when it is safe. (Idaho Driver's Manual, traffic signals)

A solid white line along the edge of the travel lane marks:

• a.The center of the road
• b.A passing zone
• c.A bike-only lane
• d.The right edge of the roadway✓

A solid white edge line marks the right boundary of the travel lane; stay to its left. (Idaho Driver's Manual, pavement markings)

A downward-pointing triangle sign means:

• a.Stop and wait for a signal
• b.Yield the right-of-way, slowing or stopping if needed✓
• c.No entry
• d.One-way traffic

The inverted triangle is a YIELD sign; slow down and give the right-of-way to traffic and pedestrians. (Idaho Driver's Manual, regulatory signs)

At a four-way stop where two vehicles arrive at the same time, right-of-way goes to:

• a.The driver on the right✓
• b.The driver on the left
• c.The larger vehicle
• d.The vehicle turning left

When drivers arrive together at a four-way stop, the one on the left yields to the one on the right. (Idaho Driver's Manual, right-of-way)

When entering a roundabout, you should:

• a.Stop fully before entering every time
• b.Travel clockwise
• c.Yield to traffic already in the roundabout and enter to the right✓
• d.Enter at highway speed

Yield to pedestrians and to vehicles already circulating, then enter the roundabout to the right. (Idaho Driver's Manual, roundabouts)

You are turning left at a green light with oncoming traffic. You must:

• a.Turn before they reach you
• b.Yield to oncoming vehicles and pedestrians until it is safe✓
• c.Expect them to slow for you
• d.Flash your lights and go

A green light does not protect a left turn; yield to oncoming traffic and pedestrians first. (Idaho Driver's Manual, turning)

When an emergency vehicle approaches with lights and siren, you should:

• a.Keep your speed
• b.Stop where you are in the lane
• c.Move into the left lane
• d.Pull to the right and stop until it passes✓

Pull to the right edge of the road, clear of intersections, and stop until the emergency vehicle passes. (Idaho Driver's Manual, emergency vehicles)

On a multilane highway, slower traffic should:

• a.Keep to the right except when passing✓
• b.Stay in the left lane
• c.Use the shoulder
• d.Straddle two lanes

Idaho follows keep-right rules; use the left lane mainly to pass and return right when finished. (Idaho Driver's Manual, lane use)

A dependable way to keep a safe following distance is to:

• a.Stay one car length back at any speed
• b.Follow closely to prevent cut-ins
• c.Keep at least a three-second gap and more in poor conditions✓
• d.Copy the brake lights ahead

The three-second rule scales with speed; add time in rain, snow, fog, or dust. (Idaho Driver's Manual, following distance)

When sharing the road with a motorcycle, you should:

• a.Share the lane side by side
• b.Allow it a full lane and check your blind spots✓
• c.Pass within inches
• d.Assume it stops instantly

Motorcycles are entitled to a full lane and are easy to overlook; give them room and check blind spots. (Idaho Driver's Manual, sharing the road)

A school bus ahead shows flashing red lights and an extended stop arm. You must:

• a.Stop and stay stopped until the lights stop flashing and the arm folds✓
• b.Pass slowly on the left
• c.Slow to 20 mph and continue
• d.Proceed if no children are visible

Stop for a school bus displaying flashing red lights and a stop arm, and stay stopped until it withdraws them. (Idaho Driver's Manual, school buses)

Idaho's seat belt law requires that:

• a.Only the driver buckle up
• b.Only children use restraints
• c.Belts are optional for adults
• d.Every driver and passenger be properly restrained, with child safety seats for young children✓

All occupants must be properly restrained, and younger children must ride in an appropriate child safety seat. (Idaho Driver's Manual, occupant protection)

Unless otherwise posted, the speed limit in an Idaho school zone when children are present is commonly:

• a.10 mph
• b.20 mph✓
• c.35 mph
• d.45 mph

School zones are commonly posted at 20 mph when children are present; obey any posted limit. (Idaho Driver's Manual, school zones)

Idaho's basic speed rule means you must:

• a.Always drive the posted maximum
• b.Keep pace with the fastest traffic
• c.Drive at a speed that is reasonable and prudent for conditions✓
• d.Never exceed 45 mph

You must choose a speed that is safe for actual conditions, which may be below the posted limit. (Idaho Driver's Manual, speed)

In rain, snow, fog, or blowing dust you should:

• a.Reduce speed and increase your following distance✓
• b.Keep your normal speed
• c.Follow closely to see better
• d.Speed up between gusts

Reduced traction and visibility call for slower speeds and more space to stop. (Idaho Driver's Manual, adjusting to conditions)

The highest speed limit posted on some Idaho rural interstate sections is:

• a.55 mph
• b.65 mph
• c.70 mph
• d.80 mph✓

Idaho posts up to 80 mph on certain rural interstate segments; always obey the posted sign, which sets the legal maximum. (Idaho Driver's Manual, speed limits)

In Idaho, a driver 21 or older is legally impaired (DUI) at a blood alcohol concentration of:

• a.0.05 percent
• b.0.08 percent✓
• c.0.10 percent
• d.0.12 percent

The adult legal limit is 0.08 percent BAC; you can still be charged below that if impaired. (Idaho Driver's Manual, impaired driving)

For drivers under 21, Idaho's alcohol limit is:

• a.The same 0.08 as adults
• b.0.05 percent
• c.0.02 percent (zero tolerance)✓
• d.No limit with a parent present

Idaho applies a 0.02 percent BAC zero-tolerance limit to drivers under 21. (Idaho Driver's Manual, underage drinking and driving)

In Idaho, the minimum age to obtain a Supervised Instruction Permit (SIP) is:

• a.14 and a half (14 1/2) years old✓
• b.15 years old
• c.16 years old
• d.17 years old

Idaho allows a Supervised Instruction Permit at 14 1/2 years of age, earlier than most states. (Idaho Driver's Manual, graduated licensing)

Under Idaho's graduated licensing, a driver under 16 may generally:

• a.Drive any time with no restrictions
• b.Carry unlimited passengers
• c.Drive alone at night immediately
• d.Drive only during daylight unless accompanied by a licensed adult 21 or older✓

Drivers under 16 may drive only in daylight unless a licensed adult 21 or older is in the front seat, and passengers under 17 are limited in the first months. (Idaho Driver's Manual, graduated licensing)