Why is dropping the wheels of a tall truck onto a low shoulder especially dangerous near roadside signs?
Correct answer: The truck may lean toward a sign or another overhead obstacle.
An edge drop-off can tilt the vehicle. The top of a tall truck may move toward a sign, branch or other obstacle even when the tires miss it. Keep the whole vehicle's clearance in mind.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.8.2 Hazardous Roads / Drop Off; printed page 2-19, physical PDF page 41; reviewed September 22, 2026. ↗
A box is lying in your truck's lane. You cannot tell what is inside. What is the safest assumption?
Correct answer: It may contain a heavy object capable of damaging the vehicle.
Do not treat an unknown box as harmless. Debris can damage tires, wheels and other parts, including lines beneath a vehicle. Look for a safe response without a sudden unplanned swerve.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.8.2 Hazardous Roads / Foreign Objects; printed page 2-19, physical PDF page 41; reviewed September 22, 2026. ↗
While approaching a stopped transit bus, which hidden hazard should a truck driver anticipate?
Correct answer: A person stepping into the road from in front of the bus.
A large stopped vehicle can hide people who enter the road. Slow and remain prepared for a pedestrian to appear; do not assume that leaving a bus means a person has seen your truck.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.8.3 Drivers Who Are Hazards / stopped buses; printed page 2-19, physical PDF page 41; reviewed September 22, 2026. ↗
A parked car's reverse lights come on as your truck approaches. What should you prepare for?
Correct answer: The car may back into your path.
Lights, moving front wheels and other visible activity can warn that a parked vehicle may enter your path. Treat them as a reason to prepare, not as proof that its driver has seen you.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.8.3 Drivers Who Are Hazards / Parked Vehicles; printed page 2-19, physical PDF page 41; reviewed September 22, 2026. ↗
A delivery van is stopped beside the road with its rear doors open. What deserves extra attention as you approach?
Correct answer: A delivery worker stepping out from a hidden position.
Delivery activity can put people close to moving traffic, sometimes hidden by the vehicle or its doors. Scan for people and leave space instead of assuming the area beside the van is empty.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.8.3 Drivers Who Are Hazards / Delivery Trucks; printed page 2-19, physical PDF page 41; reviewed September 22, 2026. ↗
You notice a car ahead braking unpredictably near an exit. What is the main benefit of treating it as a developing hazard?
Correct answer: You can plan space and an escape option before an emergency.
Hazard recognition gives you time to plan. Consider what might happen and how to respond while keeping your observations current; a prediction is not a guarantee of the other driver's movement.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.8.4 Always Have a Plan; printed page 2-21, physical PDF page 43; reviewed September 22, 2026. ↗
A hands-free conversation leaves both hands available. Does that mean it cannot distract a CMV driver?
Correct answer: No. It can still take attention away from driving.
Distraction can be mental as well as physical. A hands-free arrangement does not guarantee full attention to driving, particularly during a demanding conversation or traffic situation.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.9.4 Cell/Mobile Phones; printed page 2-22, physical PDF page 44; reviewed September 22, 2026. ↗
Another driver makes an angry gesture and tries to provoke you. What is the safest response?
Correct answer: Avoid engaging and give the driver room to move away.
Do not turn another person's aggressive behavior into a confrontation. Keep your attention on safe driving, avoid retaliation and allow separation when you can do so safely.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.10.3 Confrontation with an Aggressive Driver; printed page 2-24, physical PDF page 46; reviewed September 22, 2026. ↗
A nearby car drifts within its lane while its driver repeatedly looks down. What should you do?
Correct answer: Allow extra room and be ready for an unexpected movement.
Drifting and diverted attention can indicate distraction. Increase your margin for an unpredictable movement rather than relying on the other driver to notice you or signal reliably.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.9.7 Other Distracted Drivers; printed page 2-23, physical PDF page 45; reviewed September 22, 2026. ↗
A driver cannot recall the last several miles and has missed an exit. What is the safest interpretation?
Correct answer: Fatigue may be affecting awareness and requires a safe stop.
Missing recent driving memories or signs can be a fatigue warning. The driver should safely stop and address the need for rest, not use another vehicle as a substitute for alertness.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.11.2 Driver Factors / Warning Signs of Fatigue; printed page 2-25, physical PDF page 47; reviewed September 22, 2026. ↗
Why should a driver avoid darkly tinted glasses when driving at night?
Correct answer: They reduce the light available for seeing hazards.
Night driving already offers less visual information. Dark lenses reduce available light further. Do not try to solve glare by making the whole scene darker.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.11.5 Night Driving Procedures / eyeglasses; printed page 2-27, physical PDF page 49; reviewed September 22, 2026. ↗
Headlight glare seems worse through a windshield with an oily film inside. What should you do before another night trip?
Correct answer: Clean both the inside and outside glass surfaces.
Dirt and film can scatter light and worsen glare. Cleaning inside and outside glass, along with mirrors and lights, helps preserve the limited visibility available at night.
Source: ALEA Commercial Driver's License Manual, posted 160-page PDF, Section 2 body version July 2017; 2.11.4 Vehicle Factors / Windshield and Mirrors; printed page 2-27, physical PDF page 49; reviewed September 22, 2026. ↗