CDL General Knowledge — All Questions

You must stop on the shoulder of a divided highway because of a mechanical problem. Where do you place your warning devices?

• a.One within 10 feet of the rear, one about 100 feet back, and one about 200 feet back toward approaching traffic✓
• b.One at 50 feet and two at 500 feet
• c.All three within 10 feet of the vehicle
• d.Only one, directly behind the vehicle

On a divided or one-way roadway the triangles go at roughly 10, 100, and 200 feet behind the vehicle facing approaching traffic, and they must be placed within 10 minutes. Bunching them at the vehicle, using only one, or the 50 and 500 foot spacing does not give approaching drivers proper warning.

You are driving an empty flatbed trailer in strong crosswinds on an open stretch of highway. What is the greatest concern?

• a.Fuel consumption will drop
• b.The engine will overheat
• c.The air brakes will lose pressure faster
• d.The light trailer can be pushed sideways or even blown over, so speed must be reduced✓

An empty or lightly loaded high-sided trailer has little weight to resist wind force, so a strong gust can push it out of the lane or tip it. Wind does not cause overheating or air loss, and fuel savings are irrelevant to the safety issue.

Which surface is most likely to be icy first when temperatures drop toward freezing?

• a.The center of an urban intersection
• b.Bridges, overpasses, and shaded areas✓
• c.A long straight stretch of dry asphalt
• d.A recently paved uphill lane

Bridges and overpasses lose heat from both the top and the underside and freeze before the surrounding road, and shaded spots stay cold longer. Sun-exposed straight roads, busy intersections, and fresh pavement generally retain heat longer.

You are following a car at a safe distance when another driver cuts into the gap in front of you. What should you do?

• a.Speed up and stay close so no one else can merge
• b.Sound your horn continuously
• c.Flash your high beams to make the driver move over
• d.Ease off the accelerator and drop back to re-establish a safe following distance✓

The only useful response is to rebuild the space cushion you need to stop safely. Flashing lights, tailgating, and prolonged horn use escalate the situation without restoring the stopping distance you just lost.

You are driving slower than the flow of traffic because of a heavy load on a long upgrade. What is the correct action?

• a.Stay in the right lane and turn on your four-way flashers to warn faster traffic✓
• b.Speed up beyond a safe speed to match traffic
• c.Drive on the shoulder
• d.Move to the left lane so others can pass on the right

Staying right and using hazard flashers warns approaching drivers that you are moving well below traffic speed. Blocking the left lane, driving on the shoulder, and forcing an unsafe speed all create additional hazards.

Why does an empty truck often take longer to stop than the same truck when loaded?

• a.The brakes are disconnected when empty
• b.Empty trucks always travel at higher speeds
• c.With less weight pressing the tires down there is less traction, and the stiff suspension and brakes sized for a full load cause wheels to lock up more easily✓
• d.Empty trucks have smaller brake chambers

Braking systems and suspensions on heavy vehicles are designed for a loaded weight, so an empty vehicle has reduced traction and lock-up occurs sooner. Speed is a driver choice, brakes are never disconnected, and chamber size does not change with the load.

A driver behind you is tailgating your trailer on a two-lane road. What is the safest response?

• a.Increase your own following distance, stay steady, avoid sudden moves, and make it easy for the driver to pass✓
• b.Turn on your hazard lights and stop in the lane
• c.Speed up until the driver falls back
• d.Brake sharply to send a message

Extra space ahead gives you room to slow gradually instead of braking hard in front of a tailgater. Brake-checking, racing away, and stopping in a travel lane all raise the chance of the rear-end collision you are trying to avoid.

On a mountain grade you see a sign for a runaway vehicle ramp ahead. What is its purpose?

• a.It is a parking area for chaining up in winter
• b.It is a mandatory rest stop for descending vehicles
• c.It is a required weigh station for loaded trucks
• d.It is an escape route designed to stop a vehicle that has lost braking ability✓

Escape ramps use gravel beds or upgrades to stop a vehicle whose brakes have faded or failed, and using one is far better than continuing downhill. They are not weigh stations, chain-up areas, or required rest stops.

You are driving in heavy snow and your windshield keeps icing over despite the wipers. What should you do?

• a.Open the side window and steer by watching the fog line
• b.Reach out the window and clear the glass while driving slowly
• c.Pull off the road in a safe place, clear the ice, and check that the defroster and wipers work before continuing✓
• d.Follow closely behind a plow so its spray keeps the glass clear

Driving without a clear view is unsafe at any speed, so the correct response is to stop somewhere safe and restore visibility. Clearing glass while moving, tailgating a plow, and steering by the fog line all substitute for the vision you no longer have.

Why should you manage space to the sides as well as ahead of your vehicle?

• a.A heavy vehicle needs room to maneuver, and staying centered keeps you from being trapped when another driver drifts or a hazard appears✓
• b.Side space only matters in city driving
• c.Wide vehicles are exempt from lane position rules
• d.Side clearance is regulated only for oversize loads

Keeping a cushion on both sides preserves an escape path when a hazard develops and prevents being boxed in by other traffic. Side space matters at highway speed as much as in town, and no exemption relieves a wide vehicle of staying in its lane.

Which sequence describes double clutching to shift into a higher gear?

• a.Accelerate hard, shift without the clutch, then brake
• b.Release the accelerator, push in the clutch and shift to neutral, release the clutch, let engine and gear speeds drop to the range for the next gear, push in the clutch and shift to the higher gear, release the clutch and accelerate✓
• c.Shift to neutral, coast until the vehicle slows, then select any gear
• d.Push in the clutch once, shift directly to the higher gear, and release the clutch

Double clutching passes through neutral with the clutch released so engine and transmission speeds can match before the next gear is selected. Single clutching, floating gears without matching speeds, and coasting in neutral all grind gears or leave the vehicle without power control.

When downshifting, what do you do differently compared with upshifting?

• a.While in neutral with the clutch released, you press the accelerator to raise engine rpm before selecting the lower gear✓
• b.You apply the service brakes throughout the shift
• c.You hold the clutch down through the whole shift
• d.You skip neutral entirely

A lower gear turns faster at the same road speed, so engine speed must be increased in neutral to match it. Skipping neutral, riding the clutch, or braking through the shift prevents the speeds from matching and can damage the transmission.

You are approaching a steep downgrade in a truck with a manual transmission. When should you select your gear?

• a.Before you start down the hill, while you still have engine and road speed to shift✓
• b.Halfway down, once you can judge the grade
• c.Only if the brakes begin to fade
• d.At the bottom, after the vehicle slows

Once you are descending it may be impossible to shift into a lower gear, leaving you stuck in neutral with no engine braking. Waiting until partway down, until the bottom, or until the brakes fade all remove the option to select a safe gear.

How do you know when to shift using engine speed?

• a.Shift at the same road speed in every gear
• b.Shift whenever the vehicle feels slow
• c.Learn the operating rpm range for your engine and shift up when the tachometer reaches the top of that range✓
• d.Shift only when the engine stalls

Each engine has a recommended rpm operating range, and the tachometer tells you when the engine has reached the point to shift. Guessing by feel, using a fixed road speed for all gears, or waiting for a stall wastes fuel and can over-rev or lug the engine.

You need to back into a tight dock space and you have a choice of approach. What should you do?

• a.Back at normal forward speed to keep momentum
• b.Back toward the driver's side so you can see the trailer and the space through the side window✓
• c.Back toward the blind side because it is a shorter turn
• d.Rely only on the passenger-side mirror

Driver-side backing lets you look directly out the window and see the rear of the trailer, which is why it is the preferred method. Blind-side backing hides the danger zone, backing fast removes reaction time, and using a single mirror leaves half the area unseen.

What does the safe-backing practice known as GOAL stand for and require?

• a.Gear Out And Lock, meaning you lock the differential
• b.Go Only At Low speed, meaning speed is the only concern
• c.Gauge Overhead And Left, meaning you check only overhead clearance
• d.Get Out And Look, meaning you walk back to inspect the path and clearances before and during backing✓

Getting out and physically checking the path is the single most reliable way to avoid striking objects you cannot see from the seat. The other expansions are invented and none of them replaces actually inspecting the area behind the vehicle.

You are backing a trailer and it begins to drift off your intended line. What is the correct correction?

• a.Set the parking brake and start over from the dock
• b.Stop, correct with small steering movements or pull forward to reposition, and back slowly using both mirrors✓
• c.Continue backing and hope it straightens
• d.Turn the steering wheel sharply and keep backing quickly

Small corrections made early keep the trailer on line, and pulling forward to reset is always acceptable when the angle gets away from you. Continuing blindly, oversteering at speed, or abandoning the maneuver mid-position leads to a jackknife or a collision.

You are making a tight right turn at an intersection in a tractor-trailer. What is the correct technique?

• a.Straddle both lanes for the entire turn
• b.Signal left, then turn right
• c.Keep the rear of the vehicle close to the curb, turn wide as you complete the turn rather than before it, and do not let a vehicle squeeze in on your right✓
• d.Swing wide to the left before turning so the trailer clears

Turning wide at the end keeps the trailer from riding over the curb while preventing another driver from slipping into the gap on your right. Swinging left first invites a vehicle beside you, a left signal misleads other drivers, and straddling lanes for the whole turn blocks traffic unnecessarily.

What is off-tracking, and why does it matter in turns?

• a.The trailer rides a wider path than the tractor, so you must stay left
• b.The trailer brakes apply before the tractor brakes
• c.The vehicle drifts backward on an upgrade
• d.The rear wheels follow a shorter path than the front wheels, so the trailer can cut across curbs, poles, or an adjacent lane✓

Because the rear wheels track inside the path of the steer axle, the longer the vehicle the more the rear cuts the corner. Trailers do not swing wider than the tractor in a turn, and rollback and brake timing are separate issues.

You are coupling a tractor to a trailer. Which step comes immediately before backing under the trailer?

• a.Perform the tug test
• b.Raise the landing gear fully
• c.Remove the wheel chocks
• d.Connect the air lines, supply air to the trailer, and make sure the trailer brakes are locked✓

Charging the trailer air system and locking its brakes keeps the trailer from rolling as the fifth wheel slides under the apron. Raising the landing gear, removing chocks, and the tug test all come after the coupling is made.

Before backing under a trailer, how should the trailer height be set?

• a.Slightly lower than the center of the fifth wheel so the trailer is lifted a little as the tractor backs under✓
• b.As high as the landing gear will go
• c.High enough that the fifth wheel passes underneath without touching
• d.Exactly level with the top of the fifth wheel

A trailer set slightly low is raised as the tractor backs under, which ensures the kingpin engages the jaws properly. A trailer that is too high lets the tractor slide under without coupling or strikes the nose, and exactly level or fully raised risks a missed or damaged coupling.

You are uncoupling a trailer in a yard. Which sequence is correct?

• a.Disconnect the air lines first, then pull forward, then lower the landing gear
• b.Pull the fifth wheel release, then lower the landing gear, then chock the wheels
• c.Ease pressure on the locking jaws, chock the trailer wheels, lower the landing gear until it takes the weight, disconnect the air and electrical lines and secure them, pull the release handle, and pull the tractor partially clear before checking✓
• d.Lower the landing gear, pull completely clear, then disconnect the lines

Taking pressure off the jaws, securing the trailer, setting the landing gear, and only then releasing and easing forward keeps the trailer supported at every step. The other sequences release the coupling or the lines before the trailer is supported, which can drop the trailer or tear the air lines apart.

After uncoupling, you notice the landing gear crank handle is left extended. Why must it be secured?

• a.An unsecured handle can catch on a passing vehicle or on the tractor and cause injury or damage✓
• b.It affects the trailer air pressure
• c.It changes the axle weight distribution
• d.It voids the inspection report

A crank handle left hanging is a physical hazard that can strike people or equipment moving nearby. It has no effect on air pressure, weight distribution, or the validity of an inspection report.

You are parking on a slight grade and will leave the vehicle. What should you do?

• a.Leave the engine running so the air system stays charged
• b.Rely on the service brakes alone
• c.Leave the transmission in a low gear with the brakes released
• d.Shut the engine off, apply the parking brakes, and chock the wheels if the vehicle may roll✓

Parking brakes plus chocks are what hold a heavy vehicle on a grade once the driver leaves. Service brakes bleed off as air pressure drops, and leaving the engine running or the brakes released allows the vehicle to move.

You are on a slick, snow-covered road descending a grade. What should you do with the engine brake or retarder?

• a.Use it only in combination with the trailer hand valve
• b.Turn it off, because a retarder can cause the drive wheels to lose traction and skid on a slippery surface✓
• c.Cycle it on and off every few seconds
• d.Set it to the highest setting for maximum control

Retarders act on the drive wheels, and on ice or packed snow that braking force can break traction and start a jackknife. Higher settings and rapid cycling make the problem worse, and the trailer hand valve should not be used as a speed-control device on a grade.

You are stopped on an upgrade in a manual-transmission truck and need to start moving without rolling back. What is the correct technique?

• a.Partially engage the clutch until you feel the vehicle try to move, then release the parking brake while adding throttle✓
• b.Start in the highest gear available
• c.Rev the engine to maximum and drop the clutch
• d.Release the parking brake first, then find the friction point

Holding the vehicle with the parking brake until the clutch takes hold prevents rollback into whatever is behind you. Releasing the brake first causes rollback, dumping the clutch at high rpm shocks the driveline, and starting in a high gear stalls the engine.

How should you hold the steering wheel when driving a heavy vehicle?

• a.Firmly with both hands on opposite sides of the wheel✓
• b.With one hand at the top of the wheel
• c.With both hands together at the bottom
• d.With the wrist hooked over the top spoke

Both hands on opposite sides give the leverage and control needed if a tire blows or you hit a rut. One-handed, hooked-wrist, and hands-together grips can all be torn loose by a sudden jolt through the steering.

What is the correct way to make a normal stop in a vehicle with air brakes?

• a.Push the brake pedal down steadily and control the pressure so the vehicle comes to a smooth stop✓
• b.Pull the trailer hand valve first and then use the pedal
• c.Stab the pedal down and release repeatedly
• d.Shift to neutral and let the vehicle coast to a stop

Steady, controlled pedal pressure produces a smooth stop and keeps the vehicle in line. Stab braking is an emergency technique, the trailer hand valve alone can cause a trailer skid, and coasting in neutral removes engine braking and control.

Why should you avoid coasting in neutral while driving a commercial vehicle?

• a.It wears out the clutch pedal spring
• b.You lose engine braking and the ability to accelerate out of a hazard, and it is illegal in many states✓
• c.It causes the tachometer to read incorrectly
• d.It automatically disables the ABS

In neutral the engine no longer helps control speed and you cannot power away from a developing hazard, which is why most states prohibit it. Clutch springs, tachometer accuracy, and ABS operation are unrelated to being in neutral.

You need to pull into a truck stop space at night and only a blind-side space is open. What is the safest practice?

• a.Back in using the mirrors alone without stopping
• b.Get out and look, walk the path, use a spotter if one is available, and back very slowly with frequent stops to re-check✓
• c.Back in quickly before other traffic arrives
• d.Park in the driving lane instead

A blind-side maneuver hides the danger area, so walking the path and using a helper or repeated checks is the only safe approach. Rushing, relying only on mirrors, and blocking a driving lane each create a greater hazard.

What happens if you turn too sharply while backing a tractor-trailer?

• a.The fifth wheel unlocks
• b.The steering axle lifts off the ground
• c.The trailer can jackknife against the tractor and damage both units✓
• d.The trailer brakes lock automatically

Excessive angle between tractor and trailer during backing folds the units together and can crush the cab, fenders, or air lines. Trailer brakes do not lock on their own, the steer axle stays down, and the fifth wheel does not unlock from a sharp angle.

Why should you check the trailer height and the position of the fifth wheel jaws visually after coupling, even after a successful tug test?

• a.Visual checks are only needed on flatbed trailers
• b.The tug test only checks the electrical connection
• c.The jaws cannot be seen from outside the vehicle
• d.A high hitch can appear locked while the kingpin sits on top of the closed jaws, which can pull apart in traffic✓

A high hitch can leave the kingpin resting above the jaws so the coupling looks secure but is not, which is why the manual requires looking under the trailer with a flashlight. Visual checks apply to all trailer types, the tug test is a mechanical check, and the jaws are visible from beneath the coupling.

A car pulls out directly in front of you and there is not enough distance to stop. What is generally the best response?

• a.Downshift and hope the gap clears
• b.Sound the horn and maintain speed
• c.Brake as hard as possible and hold the pedal down
• d.Steer around the hazard if there is an escape path, because a vehicle can change direction faster than it can stop✓

Stopping distance grows with the square of speed, but the time needed to steer around an obstacle changes very little, so an evasive steer is often the only option that works. Locking the brakes destroys steering control, the horn does not shorten the closing distance, and downshifting is far too slow to help.

You are traveling at highway speed when a front tire blows out. What should you do first?

• a.Brake hard immediately
• b.Accelerate to regain control
• c.Hold the steering wheel firmly, stay off the brake, and let the vehicle slow on its own before easing to the shoulder✓
• d.Steer sharply onto the shoulder

Braking on a blown tire pulls the vehicle sharply toward the failed side, so you must keep it straight and let it slow before braking gently and pulling off. Sharp steering can roll the vehicle, and accelerating adds energy to an already unstable situation.

How can you tell that a tire has failed if you did not hear the blowout?

• a.The fuel gauge drops rapidly
• b.The air pressure gauge reads zero
• c.A thumping or vibration, a sudden change in steering feel, or the rear of the vehicle fishtailing✓
• d.The engine loses power

Vibration, a pull in the steering when a front tire fails, or a fishtailing rear when a rear tire fails are the usual clues. Tire failure does not affect fuel level, brake system air pressure, or engine power.

Your right wheels drop off the pavement onto a soft shoulder at 55 mph. What is the correct recovery?

• a.Steer back onto the pavement while maintaining speed
• b.Keep a firm grip, stay off the brake and take your foot off the accelerator, let the vehicle slow, then turn back onto the pavement sharply at low speed✓
• c.Accelerate to power back onto the road
• d.Brake hard and steer left immediately

Trying to climb back onto the pavement at speed can throw the vehicle across the road or into a rollover, so you slow first and then make a deliberate sharp return. Hard braking on a soft shoulder can cause a skid, and accelerating increases the speed at which you re-enter the lane.

Your air brakes fail on a downgrade and the low-pressure warning is on. What is your best course of action?

• a.Downshift to use engine braking, look for an escape ramp or an uphill escape route, and use the parking brake or a soft-shoulder route as a last resort✓
• b.Pump the brake pedal rapidly to rebuild pressure
• c.Shut off the engine to stop the vehicle
• d.Shift to neutral so the vehicle rolls more freely

Engine braking and an escape ramp are the reliable tools once the service brakes are gone, and speed must be controlled before it becomes uncontrollable. Pumping air brakes wastes remaining pressure, neutral increases speed, and shutting off the engine removes power steering and engine braking together.

Which type of fire extinguisher should you use on an electrical fire in the cab?

• a.A pressurized garden hose
• b.Any extinguisher, as long as it is full
• c.A water extinguisher
• d.A B:C rated extinguisher such as dry chemical or carbon dioxide✓

Electrical fires are Class C, so the agent must be non-conductive, which is why a B:C or A:B:C rated dry chemical or carbon dioxide unit is required. Water conducts electricity and can electrocute the user or spread the fire, and choosing an extinguisher by fullness alone ignores the class rating.

A grease or fuel fire starts near the engine. Why must you never use water on it?

• a.Water damages the paint
• b.Water freezes on hot metal
• c.Water is too heavy to carry
• d.Water spreads burning liquid instead of putting it out✓

Burning liquids float on water, so a stream of water scatters the fire over a larger area. Weight, freezing, and paint damage are irrelevant compared with the danger of spreading a Class B fire.

You are using a fire extinguisher on a small cargo fire. What is the correct technique?

• a.Stay upwind, position yourself about 6 to 10 feet away, pull the pin, aim at the base of the fire, and sweep side to side✓
• b.Empty the extinguisher into the smoke above the fire
• c.Stand as close as possible and aim at the top of the flames
• d.Approach from downwind so the wind carries the agent in

Aiming at the base attacks the fuel source, and staying upwind and back keeps you clear of heat and fumes. Standing too close, spraying smoke, or approaching from downwind exposes you to the fire and wastes the extinguisher's limited charge.

What is the minimum fire extinguisher rating required on a vehicle transporting hazardous materials that requires placards?

• a.No extinguisher is required if the load is non-flammable
• b.Two 2 B:C extinguishers
• c.A single extinguisher with a rating of at least 10 B:C✓
• d.A single 5 B:C extinguisher

Placarded hazardous materials vehicles must carry an extinguisher rated at least 10 B:C, while other commercial vehicles need at least a 5 B:C or two units rated 4 B:C each. Smaller units do not meet the hazmat standard, and every commercial vehicle needs an extinguisher regardless of the cargo.49 CFR §393.95

You are the first vehicle at the scene of a crash on a rural highway. What is the correct order of priorities?

• a.Take photographs first for the insurance claim
• b.Move all injured people off the roadway immediately, then call for help
• c.Leave the scene to find a phone with better signal
• d.Protect the area so no further crashes occur, notify authorities, then care for the injured✓

Preventing a second collision protects both you and the people already involved, and emergency services are needed before hands-on care. Moving injured people risks worsening spinal injuries unless fire or another danger is present, and photographs or leaving the scene delay the response.

You have just left the shipper with a secured load. When must you first re-inspect the cargo and its securement?

• a.Within the first 50 miles of the trip✓
• b.After 500 miles
• c.Only if the load shifts noticeably
• d.Only at the destination

The rule requires an inspection within the first 50 miles, then a re-examination every 150 miles or every 3 hours of driving, whichever comes first. Waiting until the destination, 500 miles, or a noticeable shift means the securement has already failed.49 CFR §392.9

What is the minimum aggregate working load limit for the tiedowns securing a piece of cargo?

• a.At least 50 percent of the weight of the cargo being secured✓
• b.There is no numeric requirement
• c.100 percent of the weight of the cargo
• d.25 percent of the weight of the cargo

The combined working load limit of all tiedowns must equal at least half the weight of the article being secured. Twenty-five percent is below the standard, requiring 100 percent overstates the rule, and the requirement is clearly numeric.49 CFR §393.106

You are securing a single 12-foot pipe weighing 1,800 pounds on a flatbed. How many tiedowns are required at minimum?

• a.Two tiedowns
• b.Three tiedowns✓
• c.One tiedown
• d.Four tiedowns

An article longer than 10 feet needs two tiedowns for the first 10 feet plus one more for each additional 10 feet or fraction, so a 12-foot article needs three. One tiedown is only allowed for articles 5 feet or shorter and 1,100 pounds or less, and four exceeds the minimum for this length.49 CFR §393.110

Your load is stacked high in a van trailer with the heaviest cases on top. Why is this dangerous?

• a.It makes the trailer harder to unload
• b.It causes the trailer brakes to overheat
• c.A high center of gravity makes the vehicle much more likely to roll over in a curve or in a sudden maneuver✓
• d.It increases fuel consumption

Heavy weight placed high raises the center of gravity, and rollover risk climbs sharply in curves, on ramps, and during evasive steering. Unloading effort, fuel use, and brake temperature are minor compared with the stability problem.

What is the maximum gross vehicle weight generally allowed on the Interstate highway system without a special permit?

• a.60,000 pounds
• b.100,000 pounds
• c.70,000 pounds
• d.80,000 pounds✓

The federal limit is 80,000 pounds gross, with 20,000 pounds on a single axle and 34,000 pounds on a tandem axle set, subject to the bridge formula. Sixty and seventy thousand are below the legal maximum, and 100,000 pounds requires a permit.

You are scaled at 21,000 pounds on the steer axle and 33,000 pounds on the drive tandem. What is the problem?

• a.The drive tandem exceeds the tandem limit
• b.Nothing is wrong because the gross weight is legal
• c.Both axle groups are over the limit
• d.The single steer axle exceeds the 20,000 pound federal limit and weight must be shifted✓

A single axle is limited to 20,000 pounds, so 21,000 is overweight even though the tandem at 33,000 is under the 34,000 pound limit. A legal gross weight does not excuse an overloaded individual axle, and only the steer axle is over here.

You are hauling a placarded load of flammable liquid. Where must the shipping papers be kept while you are driving?

• a.In the sleeper berth
• b.Locked in the trailer with the cargo
• c.Within the driver's immediate reach while the seat belt is fastened, and clearly visible or in a pouch on the driver's door✓
• d.Emailed to the carrier is sufficient

Emergency responders must be able to find the papers quickly, so they must be within reach and identifiable from the driver's side. Papers in the trailer, in a sleeper, or only in electronic form at the office are unavailable to responders at the scene.

What is the primary purpose of hazardous materials placards on a commercial vehicle?

• a.To warn the public and emergency responders of the class of hazard on board✓
• b.To indicate the value of the cargo
• c.To identify the shipper and consignee
• d.To show the vehicle's insurance coverage

Placards communicate the hazard class so responders can select the correct tactics before approaching the vehicle. They do not identify the parties to the shipment, the cargo value, or the insurance.