Idaho Passenger CDL Practice Test

This is a free 20-question practice test for the Passenger portion of the Idaho Commercial Driver's License knowledge exam. Questions are pulled from a pool of 58 drawn from the AAMVA CDL Manual, which is the source document the Idaho Transportation Department Division of Motor Vehicles uses to write its actual exam.

How it works: Click an answer. The correct choice highlights in green, and you'll see a short explanation. Aim for 85% or better before you sit for the real test in Idaho.

Question 1 of 20

A bus driver who is convicted of using the bus to commit a felony or driving under the influence with passengers aboard faces:

No penalty
Permanent disqualification or extended disqualification
A fine only
A warning

Correct. Federal rule: certain offenses (using the CMV in a felony, DUI with passengers) bring extended or permanent disqualification.

Question 2 of 20

Passenger fatalities are most often caused by:

Single-vehicle rollovers and collisions; speed and seat belts (where required) are common factors
Mechanical failure
Bad weather only
Cargo

Correct. Single-vehicle rollover and head-on/angle collisions account for most passenger fatalities. Speed control and where applicable, seatbelt use, reduce risk.

Question 3 of 20

A passenger bus driver who must operate over the bridge or in the tunnel:

Must respect any posted height, weight, and route restrictions
Can ignore signs
Drives faster
Reroutes through tunnels always

Correct. Verify posted weight, height, and routing restrictions. Bus routes may require pre-planning to avoid prohibited corridors.

Question 4 of 20

A bus that has been in an accident:

Should be inspected before continuing in service
Can continue immediately
Is fine if no passengers complain
Does not require inspection

Correct. Post-accident inspection is required by carrier policy and federal rules. Damage to brakes, suspension, or structure may not be visible without inspection.

Question 5 of 20

The "standee line" on a bus marks:

Where standees may not pass while the bus is in motion (typically 2 feet behind the driver)
The middle aisle
The rear emergency exit
The fuel-fill location

Correct. On buses with a standee line, passengers may not stand forward of the line while the bus is moving. The line keeps standees clear of the driver and exit doors.

Question 6 of 20

Maximum passenger capacity is determined by:

Vehicle manufacturer's rating and seating configuration
The driver's preference
The weather
The route

Correct. Manufacturer rating + seating config = maximum allowed passengers. Standees (where allowed) are capped by the standee-line capacity.

Question 7 of 20

A bus driver in heavy fog should:

Reduce speed substantially, use low beams, avoid sudden stops
Speed up to clear it
Use high beams
Tailgate

Correct. Same fog rules as any vehicle: low beams, slow speed, gentle inputs, four-way flashers if moving slowly.

Question 8 of 20

When stopping at a railroad crossing, the bus must stop:

On the rails
Between 15 and 50 feet from the nearest rail
Anywhere within 100 feet
Only if a train is heard

Correct. Stop 15 to 50 feet from the nearest rail. Look both ways and listen before proceeding.

Question 9 of 20

After accepting passengers, the driver should:

Verify all are seated or behind the standee line, doors closed, parking brake released, then proceed
Move immediately
Wait until all are standing
Use only the trailer brake

Correct. Verify safety: all seated or behind line, doors closed, brake released, then proceed.

Question 10 of 20

You discover an emergency exit that does not function. You should:

Carry passengers anyway
Place the bus out of service until the exit is repaired
Tape it shut
Ignore it

Correct. A non-functional emergency exit puts passengers at risk. The bus is out of service until repaired.

Question 11 of 20

Crowd control during boarding:

Manage the line, watch for fare evaders if applicable, ensure passengers are inside before closing the door
Push them aboard
Skip fare collection
Allow boarding while moving

Correct. Boarding is a controlled process. Manage the line, watch for safe fare collection, ensure all passengers are aboard before closing the door.

Question 12 of 20

Most bus injuries during a trip happen because of:

Driver hitting another vehicle
Sudden stops, sharp turns, and quick lane changes throwing passengers
Engine failure
Fuel issues

Correct. Standing or unbelted passengers are vulnerable to abrupt motion. Smooth driving prevents most in-bus injuries.

Question 13 of 20

A driver may transport ___, in addition to passengers, if the carrier permits:

Express small parcels under most circumstances; the carrier sets policy
Live explosives
Tear gas
Class 7 radioactives without limit

Correct. Many bus operators permit small express packages under company policy. The hazmat rules above still apply.

Question 14 of 20

Discharging passengers should be done:

Only at safe locations — paved curb, off the road, away from traffic
Anywhere
In the middle of an intersection
Only on highways

Correct. Stop at designated stops or safe pull-offs. Never discharge into a travel lane.

Question 15 of 20

On highway travel:

Maintain steady speed, avoid abrupt lane changes, signal early
Accelerate hard
Tailgate
Lane-weave to make time

Correct. Smooth, predictable driving keeps passengers comfortable and safe.

Question 16 of 20

Passenger areas on the bus must:

Be free of obstructions, with clear access to emergency exits
Be packed full
Have blocked exits
Have loose cargo

Correct. Aisles and exits must remain clear during travel. Cargo or carry-on must not block these paths.

Question 17 of 20

When approaching a drawbridge, a bus must:

Stop at least 50 feet before the draw — unless there is a traffic light or attendant — and proceed only when you can do so safely
Cross at full speed
Honk the horn
Reverse

Correct. Stop at least 50 feet before any drawbridge. The exception is if there is a traffic-signal light or an attendant directing traffic, or the bridge has been closed and locked.

Question 18 of 20

Buses must stop at every railroad crossing:

Yes, with limited exceptions (industrial switching tracks in city traffic, abandoned tracks, streetcar tracks)
No, never
Only at night
Only if a train is in sight

Correct. Buses, school buses, and placarded hazmat vehicles must stop at every railroad crossing 15 to 50 feet from the nearest rail, with narrow exceptions.

Question 19 of 20

You should report any safety concerns about the bus:

Immediately to the carrier — never delay
Only at the end of the day
Only weekly
Never

Correct. Report safety issues immediately. Document with the daily driver vehicle inspection report (DVIR).

Question 20 of 20

When carrying medical or fragile cargo with passengers (e.g., lab specimens):

Only allowed when small quantity, packaged correctly, and stored in baggage area
Allowed in any quantity
Allowed in the cab
Always prohibited

Correct. Some emergency medical and lab shipments are allowed under tight conditions: small quantity, proper packaging, baggage-area storage, with carrier approval.

About the Idaho Passenger exam

Most states administer 20 Passenger questions and require 80% to pass. The exam covers passenger safety, vehicle inspection, loading and unloading, prohibited cargo, emergency exits, and conduct expected of a passenger-vehicle operator. A separate skills test in a representative passenger vehicle is also required.

The Idaho Transportation Department Division of Motor Vehicles follows the federal CDL standards established by FMCSA. To earn the Passenger credential, you must answer at least 80% of the questions correctly. Many candidates score lower the first time because the test pulls from a large pool — refreshing this page will give you a different mix of questions, drawn from the same authoritative source.

Want more practice? Try the full Passenger question bank or browse all Idaho CDL practice tests.