Other people often give clues before they do something dangerous. Learn the clues for blocked vision, distraction, confusion, slow or hurried drivers, and impaired drivers, and always have a plan.
People who cannot see you
A person who cannot see you is one of the most dangerous hazards. Watch for blocked vision:
- Vans, loaded station wagons, and cars with a blocked rear window.
- Rental trucks: their drivers are often not used to the poor view to the sides and rear.
- In winter, vehicles with frosted, icy or snow-covered windows.
- Vehicles partly hidden at blind intersections or alleys. If you can see only the front or rear of a vehicle and not the driver, the driver cannot see you either. They may back out or pull into your lane. Be ready to stop.
- Delivery trucks: packages or open doors block the driver's view. Drivers of step vans, postal trucks and local delivery vehicles are often rushed and may jump out or pull into traffic suddenly.
- Parked vehicles: people may get out, or the vehicle may suddenly pull out. Look for people moving inside, the vehicle moving, brake lights, backup lights, exhaust and other signs it is about to move.
- Stopped buses: passengers may walk in front of or behind the bus, and they often cannot see you.
- Pedestrians and bicyclists: walkers, joggers and cyclists may have their backs to traffic. Some wear headphones and cannot hear you. On rainy days, hats and umbrellas block their view, and they may hurry without watching traffic.
Distracted, busy or confused people
- Distracted people: watch where they are looking. If they look away, they cannot see you. Even if they look right at you, stay alert: they may think they have the right-of-way.
- Children act quickly without checking traffic. Children playing together may not look at all.
- Talkers: drivers or walkers talking with each other may not watch traffic closely.
- Workers on or near the road distract other drivers, and the workers may not see you.
- Ice cream trucks: children may be close by and may not see you.
- Disabled vehicles: people changing a tire or fixing an engine often forget the danger of passing traffic. Jacked-up wheels or raised hoods are clues.
- Crash scenes: people involved may not look for traffic, passing drivers stare at the crash, people run across the road, and vehicles may slow or stop suddenly.
- Shoppers in shopping areas look at stores and windows, not at traffic.
- Confused drivers may suddenly turn a different way or stop with no warning. Expect this most around freeway or turnpike interchanges and big intersections. Tourists are a big risk; clues are car-top luggage and out-of-state plates. Other clues: stopping mid-block, changing lanes for no clear reason, backup lights coming on suddenly, and hesitation (driving very slowly, braking often, stopping in an intersection, looking at street signs, maps or house numbers).
Slow, turning, hurried and impaired drivers
- Slow drivers: drivers who do not keep a normal speed are hazards. Seeing them early prevents crashes. Some vehicles are slow by nature: mopeds, farm machines, construction machines, tractors. Many show the slow-moving vehicle symbol: a red triangle with an orange center.
- Drivers signaling a turn may slow more than you expect, or stop. A tight turn into an alley or driveway may be very slow. If pedestrians or vehicles block them, they may stop on the road. Left-turners may stop for oncoming traffic.
- Drivers in a hurry may feel your truck is in their way. They may pass without a safe gap in oncoming traffic and cut in close in front of you, or pull out in front of you so they are not stuck behind you, forcing you to brake.
- Impaired drivers: sleepy, drunk, drugged or sick drivers. Clues: weaving or drifting side to side; leaving the road (right wheels on the shoulder, bumping a curb in a turn); stopping at the wrong time (at a green light, or waiting too long at a stop); an open window in cold weather; sudden changes in speed; or a speed that is much too fast or too slow. Watch for drunk and sleepy drivers late at night.
- Body movement clues: drivers look the way they plan to turn. Head and body movement can warn you of a turn even with no signal. A driver checking over the shoulder may be about to change lanes. These clues are easiest to see with motorcyclists and bicyclists.
Conflicts and always having a plan
You are in a conflict when you must change speed, direction, or both to avoid hitting someone. Conflicts happen at intersections, at merges (such as turnpike on-ramps), where a lane ends and you must move over, in slow or stalled traffic, and at crash scenes.
Watch for other drivers who are in conflict. When they react to their own conflict, they may do something that puts them in conflict with you.
Always have a plan. Keep looking for hazards, and remember why: hazards can turn into emergencies. You look for them so you have time to plan an escape. When you see a hazard, think about what emergency could follow and decide what you would do. Be ready to act on that plan. This is what makes you a prepared, defensive driver.
References and scope
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Manual reference: 2.8.3–2.8.4
Put it into practice
Educational questions with explanations. The answer review also works without the interactive quiz.
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Review questions with answers
- At a blind alley you can see the rear of a car but not its driver. What does this tell you?
- The car is parked and will not move
- The driver can see you in the mirror
- The driver probably cannot see you either
- You have the right-of-way, so keep going
Show answer
The driver probably cannot see you eitherIf you cannot see the driver, he or she cannot see you. Be ready to stop because the car may back out or pull into your lane.
- Why should you watch rental trucks carefully?
- Their drivers are often not used to the limited side and rear view
- They always have bad brakes
- They are not allowed on highways
- They are always overloaded
Show answer
Their drivers are often not used to the limited side and rear viewRental truck drivers are often not used to the limited vision to the sides and rear of a truck.
- Which is a clue that a parked vehicle may be about to pull out?
- It has a clean windshield
- It is parked under a street light
- It has out-of-state license plates
- Exhaust smoke or brake/backup lights are on
Show answer
Exhaust smoke or brake/backup lights are onWatch for brake lights, backup lights, exhaust, and movement inside the vehicle; these show a driver is about to move.
- Drivers of step vans, postal trucks and local delivery vehicles are hazards mainly because:
- They drive slower than the speed limit
- They are often in a hurry and may suddenly step out or pull into traffic
- They never use turn signals
- They always park on the shoulder
Show answer
They are often in a hurry and may suddenly step out or pull into trafficPackages and doors block their view, and they often rush, stepping out or driving into the lane suddenly.
- Near a stopped bus you should be careful because:
- Buses always pull out without signaling
- Bus drivers cannot use mirrors
- Passengers may cross in front of or behind it and may not see you
- Buses leak fuel when stopped
Show answer
Passengers may cross in front of or behind it and may not see youPassengers may walk in front of or behind a stopped bus, and they often cannot see you.
- On a rainy day, pedestrians may be extra hazardous because:
- Hats and umbrellas block their view and they hurry to get out of the rain
- They walk slower in the rain
- They always use crosswalks in the rain
- Rain makes them easier to see
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Hats and umbrellas block their view and they hurry to get out of the rainHats and umbrellas can keep pedestrians from seeing you, and they may hurry without watching traffic.
- A pedestrian is looking right at your truck as you approach. You should:
- Assume they will wait for you
- Speed up so they know you are coming
- Flash your high beams
- Stay alert, because they may think they have the right-of-way
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Stay alert, because they may think they have the right-of-wayEven when people look at you, they may believe they have the right-of-way. Stay alert.
- An ice cream truck on a street is a hazard clue mainly because:
- It drives very fast
- Children may be nearby and may not see you
- It blocks the whole road
- It has no brake lights
Show answer
Children may be nearby and may not see youSomeone selling ice cream means children may be close by, and they may not see you.
- Which is a hazard clue for a disabled vehicle with people working on it?
- Its turn signal is blinking
- Its windows are rolled down
- Jacked-up wheels or a raised hood
- A clean license plate
Show answer
Jacked-up wheels or a raised hoodJacked-up wheels or raised hoods are clues. People fixing vehicles often ignore the danger of passing traffic.
- Which pair of clues suggests a tourist who may be confused?
- Car-top luggage and out-of-state license plates
- A loud exhaust and tinted windows
- A clean car and a new license plate
- A trailer hitch and fog lights
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Car-top luggage and out-of-state license platesCar-top luggage and out-of-state plates are clues to tourists unfamiliar with the area.
- Where is driver confusion especially common?
- On long straight rural roads
- In empty parking lots
- On roads with no signs
- Near freeway interchanges and major intersections
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Near freeway interchanges and major intersectionsConfusion is common near freeway or turnpike interchanges and major intersections.
- The slow-moving vehicle symbol is:
- A yellow diamond with a black border
- A red triangle with an orange center
- An orange square with a red center
- A white circle with a red slash
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A red triangle with an orange centerThe slow-moving vehicle symbol is a red triangle with an orange center, used on farm machinery, construction equipment, and similar vehicles.
- Which is a sign that a driver may be impaired (sleepy, drunk, drugged or ill)?
- Using turn signals early
- Keeping a steady speed
- Stopping at a green light or waiting too long at a stop
- Checking mirrors often
Show answer
Stopping at a green light or waiting too long at a stopClues include stopping at the wrong time, weaving, leaving the road, an open window in cold weather, and sudden speed changes.
- On a cold night, a car ahead has its driver's window wide open and drifts within its lane. This is a clue of:
- A possibly impaired driver
- A driver about to park
- A driver with good ventilation habits
- A police vehicle
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A possibly impaired driverAn open window in cold weather and drifting are clues to a sleepy or impaired driver. Be alert for drunk and sleepy drivers late at night.
- A driver who makes an over-the-shoulder check may be about to:
- Stop for a red light
- Turn on headlights
- Slow for a school zone
- Change lanes
Show answer
Change lanesOver-the-shoulder checks are a body-movement clue that a driver may change lanes, even without a signal.
- Body-movement clues that a road user is about to turn are easiest to see with:
- Bus drivers
- Motorcyclists and bicyclists
- Tractor-trailer drivers
- Drivers of vans with tinted windows
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Motorcyclists and bicyclistsDrivers look the way they plan to turn; these head and body clues are most easily seen with motorcyclists and bicyclists.
- A driver who feels stuck behind your truck at an on-ramp may:
- Wait patiently for a gap behind you
- Turn on hazard lights and stop
- Pull in front of you, causing you to brake
- Always pass on the left with a safe gap
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Pull in front of you, causing you to brakeDrivers in a hurry may cut in front of you or pass without a safe gap to avoid being stuck behind you.
- You are "in conflict" when:
- You must change speed and/or direction to avoid hitting someone
- You disagree with another driver
- You are in the left lane
- Two traffic signs give different speeds
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You must change speed and/or direction to avoid hitting someoneA conflict means you have to change speed or direction to avoid a collision. They occur at intersections, merges, lane endings, stalled traffic and crash scenes.
- Why should you watch other drivers who are in conflict?
- They are required to yield to trucks
- They always signal before reacting
- They usually stop completely
- When they react, they may put themselves in conflict with you
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When they react, they may put themselves in conflict with youAnother driver's reaction to a conflict may cause them to do something that creates a conflict with you.
- Why should you make an emergency plan when you see a hazard?
- So you can report the other driver later
- So you have time to plan a way out if it becomes an emergency
- Because the law requires a written plan
- So you can drive faster past it
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So you have time to plan a way out if it becomes an emergencyYou look for hazards so you have time to plan an escape if they turn into emergencies, and be ready to act on that plan.
- Drivers or pedestrians who are talking with each other are a hazard because:
- They walk faster
- They always use cell phones
- They may not be paying close attention to traffic
- They are usually tourists
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They may not be paying close attention to trafficPeople talking to one another may not watch traffic closely.
- At a crash scene, which is a common hazard?
- Passing drivers look at the crash and vehicles may stop suddenly
- Traffic always speeds up
- People involved always watch for traffic
- The road is always closed completely
Show answer
Passing drivers look at the crash and vehicles may stop suddenlyAt crash scenes, people may run across the road, passing drivers stare, and vehicles may slow or stop suddenly.
- A car ahead is signaling a tight right turn into a driveway. What should you expect?
- It will keep its speed until the turn
- It may slow down a lot or even stop in the road
- It will always pull onto the shoulder first
- It will speed up to clear your lane
Show answer
It may slow down a lot or even stop in the roadDrivers signaling a turn may slow more than you expect or stop, especially for a tight turn or when pedestrians block them.