AF Light Vehicle Driving Theory cheat sheet
AF Light Vehicle Driving Theory · Keep the key ideas within reach.
Traffic Laws, Road Signs, Signals, and Markings
A red octagon always means STOP; a red inverted triangle always means YIELD; a red circle with a slash means the action shown is prohibited.
Yellow diamond signs warn of hazards ahead; orange diamond signs mark construction or work zones; fluorescent yellow-green warns of school zones and pedestrians.
A flashing red signal is treated as a stop sign: stop fully, yield, then proceed when clear. A flashing yellow means slow down and proceed with caution.
A solid yellow center line prohibits passing in either direction; a broken yellow line permits passing when the way is clear and legal.
Double solid white lines separate lanes moving the same direction and may not be crossed except in specific permitted maneuvers where law allows.
A steady red arrow means stop and do not turn in the arrow's direction; a green arrow grants a protected turn in that direction.
At a four-way stop, the first vehicle to stop proceeds first; if two arrive at the same time, the vehicle on the right has the right of way.
A round yellow sign with a black X and RR marks a railroad crossing; a white crossbuck sign also marks the crossing point.
A pentagon-shaped sign (point up) marks a school zone or school crossing; a pennant-shaped sign marks a no-passing zone.
Safe Driving Practices, Hazard Awareness, and Defensive Driving
The three-second following rule: when the rear of the vehicle ahead passes a fixed object, you should not reach that object in less than three seconds in good conditions.
Add at least one second of following distance for each adverse condition (rain, darkness, heavy load, or a following vehicle that cannot see you).
Total stopping distance = perception distance + reaction distance + braking distance; it rises with the square of speed, so doubling speed roughly quadruples braking distance.
Use the Smith System: Aim high in steering, Get the big picture, Keep your eyes moving, Leave yourself an out, Make sure others see you.
Space cushion rule: maintain a gap ahead, to the sides, and behind; if a tailgater closes behind, increase the gap ahead to allow gentler braking.
Hydroplaning begins when tire tread cannot clear water; it can occur at speeds as low as about 35 mph on wet pavement, so reduce speed in rain.
Scan 12-15 seconds ahead in urban areas and 20-30 seconds ahead on highways to identify hazards before they become emergencies.
At night, drive at a speed that lets you stop within the distance lit by your headlights; overdriving headlights is a leading night hazard.
Vehicle Controls, Pre-Drive Checks, and Basic Maintenance Awareness
Pre-drive walkaround checks tires for tread depth and pressure, lights for function, fluid leaks under the vehicle, and obstructions around the vehicle.
The minimum legal tread depth reference is 2/32 inch; the penny test (Lincoln's head visible) indicates tread at or near that limit.
Check engine oil with the engine off and the vehicle level; the level should fall between the MIN and MAX marks on the dipstick.
The parking brake should be set before starting the engine on a manual transmission and used whenever parked, especially on a slope.
Before moving, adjust seat, mirrors, and head restraint; the top of the head restraint should align with the top of the head.
Tire pressure is checked when tires are cold; underinflation increases rolling resistance, heat, and the risk of blowout.
Coolant is checked only when the engine is cold; opening a hot radiator cap can release scalding pressurized fluid.
Brake warning light, oil pressure light, and coolant temperature light indicate conditions requiring immediate stop and inspection.
Vehicle Safety Systems and Occupant Protection
A seat belt should be worn low across the hips and snug across the shoulder; the shoulder strap crosses the collarbone, never the neck.
Airbags supplement seat belts and do not replace them; an unbelted occupant can be injured by the deploying airbag.
Children under 13 should ride in the rear seat; rear-facing child seats must never be placed in front of an active frontal airbag.
Anti-lock brakes (ABS) prevent wheel lockup during hard braking; the correct technique is firm continuous pressure while steering.
Electronic stability control (ESC) reduces skidding by braking individual wheels and adjusting engine power; it cannot overcome excessive speed.
Traction control limits wheelspin during acceleration but does not improve cornering grip or shorten braking distance.
Head restraints reduce whiplash injury when positioned at the correct height and close to the back of the head.
Daytime running lights improve vehicle visibility to others but do not substitute for headlights at night.
Emergency Procedures and Incident Response
If a tire blows out, hold the wheel firmly, ease off the accelerator, and avoid hard braking; steer straight while slowing gradually.
If brakes fail, pump the pedal, downshift, and apply the parking brake gradually; steer toward an uphill grade or open area to bleed speed.
If the vehicle begins to skid, look and steer where you want to go and avoid sudden braking; ease off the accelerator.
If the accelerator sticks, shift to neutral, brake firmly, and steer to a safe stop while keeping control.
After a collision: stop, check for injuries, call emergency services, exchange information, and report to police as required by law.
When stopped on a roadway, turn on hazard lights and place warning triangles or flares behind the vehicle if it is safe to do so.
If a vehicle stalls on railroad tracks, exit immediately and move away from the tracks at an angle toward the approaching train's direction of travel.
If you become drowsy while driving, the only reliable remedy is to stop and rest; cold air, music, or caffeine are temporary at best.
Driving Privileges, Licensing, and Operating Regulations
A learner's permit typically requires a licensed supervising driver in the front seat and restricts driving hours and passengers.
Graduated licensing systems commonly restrict night driving and passenger counts for novice drivers until full licensure.
Driving is a privilege conditioned on holding a valid license for the vehicle class and obeying licensing restrictions.
Implied consent laws require submitting to a chemical test when lawfully requested after arrest for impaired driving; refusal carries license penalties.
The legal blood alcohol concentration limit for drivers 21 and older is commonly 0.08%; lower limits (often 0.00-0.02%) apply to underage or novice drivers.
Driving without a valid license, with a suspended license, or without required insurance is a separate offense from the underlying violation.
Vehicle registration and proof of insurance must be carried or available in the vehicle and produced on request by law enforcement.
Points assessed for moving violations accumulate on the driving record and can lead to suspension when a threshold is reached.
Traffic Laws, Road Signs, Signals, and Markings
A yellow X or diagonal arrow signal above a lane means that lane is closing or must be exited; a red X means the lane is closed.
A white diamond marking on the pavement indicates a high-occupancy vehicle (HOV) lane.
A solid white line at an intersection edge marks the stop line; stop behind it, not over it.
A yellow light means stop if you can do so safely; it does not mean accelerate to beat the red.
A left turn on red is permitted only from a one-way street onto another one-way street where state law allows it.
A right turn on red is permitted after a full stop and yield, unless a sign prohibits it.
A crosswalk with a pedestrian present requires yielding; the pedestrian in the crosswalk has the right of way.
A no-parking zone marked by a yellow curb generally prohibits stopping, standing, or parking depending on local signage.
A stop sign at a railroad crossing requires stopping before the tracks and checking both directions before proceeding.
Safe Driving Practices, Hazard Awareness, and Defensive Driving
The two-second rule is the minimum following distance in ideal conditions; three seconds is recommended for most drivers.
Use the IPDE process: Identify, Predict, Decide, Execute to handle hazards systematically.
Blind spots should be checked by turning the head, not just the mirrors; mirrors do not cover all areas around the vehicle.
When merging, match the speed of traffic and use the acceleration lane; do not stop at the end of the on-ramp unless traffic requires it.
When passing, check mirrors and blind spot, signal, accelerate smoothly, and return to the lane only when the passed vehicle is visible in the mirror.
In fog, use low beams; high beams reflect off the fog and reduce visibility.
In rain, reduce speed and increase following distance; wet roads can double stopping distance.
At intersections, scan left-right-left before proceeding; do not assume other drivers will stop or yield.
When an emergency vehicle approaches with lights and siren, pull to the right and stop until it passes.
Vehicle Controls, Pre-Drive Checks, and Basic Maintenance Awareness
The gear selector positions are typically P (park), R (reverse), N (neutral), D (drive), and L or S (low or sport).
The accelerator pedal increases speed; the brake pedal slows or stops the vehicle; the clutch pedal (manual) disengages the engine from the transmission.
The parking brake should be engaged before releasing the service brake when parking on a hill.
Turn signals should be activated at least 100 feet before a turn in urban areas and 200 feet on highways, per common state rules.
Headlights should be on from sunset to sunrise and whenever visibility is reduced, such as in rain, fog, or snow.
The horn should be used only to warn others of danger, not to express frustration.
Check the spare tire, jack, and lug wrench are present and functional before long trips.
The engine coolant reservoir level should be checked when the engine is cold; low coolant can cause overheating.
Wiper blades should be replaced when they streak or chatter; worn blades reduce visibility in rain.
Vehicle Safety Systems and Occupant Protection
Seat belts are the single most effective occupant protection device; they reduce the risk of fatal injury by about 45% in front seats.
Airbags deploy at speeds up to 200 mph and inflate in about 30 milliseconds; occupants must be positioned at least 10 inches from the steering wheel.
Child safety seats should be installed in the rear seat and secured with the seat belt or LATCH system; the seat should not move more than one inch side to side.
Rear-facing child seats should be used until the child reaches the seat's height or weight limit, typically age 1-2 and beyond.
Booster seats raise the child so the seat belt fits properly; children should use a booster until the seat belt fits without it, usually around age 8-12 or 4'9" tall.
Tire pressure monitoring systems (TPMS) alert the driver when a tire is significantly underinflated; they do not replace manual checks.
The tire placard on the driver's door jamb lists the recommended cold tire pressure; this is the correct reference, not the number on the tire sidewall.
Backup cameras and sensors assist but do not replace checking mirrors and turning to look behind before reversing.
Anti-lock brakes should not be pumped; maintain firm pressure and steer while the system pulses.
Emergency Procedures and Incident Response
If the steering fails, grip the wheel firmly, slow gradually, and pull off the road; do not slam on the brakes.
If a headlight fails at night, use the remaining light and any auxiliary lights, reduce speed, and stop as soon as safe.
If the hood flies up while driving, look through the gap under the hood or out the side window and pull over safely.
If you are involved in a collision, move the vehicle out of traffic if it is safe and there are no injuries requiring it to stay.
If you hit a parked car and cannot find the owner, leave a note with your name and contact information and report the incident to police if required.
If your vehicle catches fire, pull over, turn off the engine, get everyone out, and move at least 100 feet away; do not open the hood.
If you are stranded in cold weather, stay in the vehicle, run the engine intermittently for heat, and crack a window for ventilation.
If you are stranded in hot weather, stay in the vehicle or shade, drink water, and avoid overexertion.
Call 911 for emergencies; provide location, number of people involved, and nature of injuries.
Driving Privileges, Licensing, and Operating Regulations
A driver's license must be carried when driving and presented to law enforcement on request.
License classes vary by vehicle type; a standard passenger vehicle license does not authorize driving a commercial truck or motorcycle without the proper endorsement.
A restricted license may limit driving to certain hours, routes, or with corrective lenses; violating restrictions is a citable offense.
A driver must notify the licensing agency of a change of address within a specified period, often 10-30 days depending on the state.
A driver must report a collision to the licensing agency when it involves injury, death, or property damage above a threshold set by state law.
Driving while license suspended or revoked is a serious offense that can result in vehicle impoundment and jail time.
A driver must have liability insurance meeting the state's minimum coverage limits; driving uninsured is illegal and can result in license suspension.
A driver must yield to pedestrians and cyclists and follow all traffic control devices, including those in work zones where penalties are often doubled.
A driver must not use a handheld phone while driving in many jurisdictions; hands-free laws vary by state.
Traffic Laws, Road Signs, Signals, and Markings
A green light means proceed when safe, but you must still yield to pedestrians and vehicles already in the intersection.
A yellow light is a warning that the signal is about to turn red; you should stop if you can do so safely.
A red light means stop; you may turn right on red after a full stop and yield unless a sign prohibits it.
A left turn on red is allowed only from a one-way street onto another one-way street in some states.
A stop sign requires a full stop at the stop line or before the crosswalk; rolling stops are illegal.
A yield sign requires slowing and yielding the right of way to traffic on the intersecting road.
A four-way stop requires the first vehicle to stop to proceed first; if two arrive simultaneously, the vehicle on the right goes first.
A roundabout requires yielding to traffic already in the circle; do not stop inside the roundabout.
A school bus with flashing red lights and extended stop arm requires traffic in both directions to stop until the lights stop flashing, unless divided by a median.
Safe Driving Practices, Hazard Awareness, and Defensive Driving
The three-second rule is the minimum following distance in good conditions; increase to four or more seconds in rain, snow, or darkness.
Total stopping distance increases with speed; at 60 mph, a typical car needs about 300 feet to stop on dry pavement.
Perception-reaction time is typically 1.5 seconds; at 60 mph, the vehicle travels about 132 feet before the brakes are applied.
Hydroplaning occurs when water on the road is deeper than the tire tread; reduce speed and avoid sudden braking in heavy rain.
Use low beams in fog, rain, or snow; high beams reflect off precipitation and reduce visibility.
When a vehicle is tailgating, increase your following distance ahead so you can brake gradually and reduce the risk of a rear-end collision.
When approaching a work zone, slow down, merge early, and follow flagger instructions; fines are often doubled in work zones.
When driving at night, reduce speed and increase following distance; visibility is limited to the reach of your headlights.
When an emergency vehicle approaches, pull to the right and stop; do not block intersections.
Vehicle Controls, Pre-Drive Checks, and Basic Maintenance Awareness
Before driving, check that all occupants are buckled, mirrors are adjusted, and the seat is positioned so you can reach the pedals comfortably.
The parking brake should be set before starting the engine and released before driving; driving with it engaged can damage the brakes.
Turn signals should be used for all lane changes and turns; signal at least 100 feet before a turn in urban areas.
Headlights should be on from sunset to sunrise and in adverse weather; use low beams when approaching other vehicles.
Check tire pressure monthly and before long trips; underinflation increases wear, heat, and the risk of blowout.
Check the oil level with the engine off and the vehicle on level ground; add oil if the level is below the minimum mark.
Check the coolant level only when the engine is cold; never open a hot radiator cap.
Replace wiper blades when they streak or chatter; check washer fluid regularly.
The battery should be checked for corrosion and secure mounting; a loose battery can cause electrical failure.
Vehicle Safety Systems and Occupant Protection
Seat belts reduce the risk of fatal injury by about 45% in front seats and by about 60% in light trucks.
Airbags are supplemental restraints; they are designed to work with seat belts, not replace them.
Children under 13 should ride in the back seat; rear-facing child seats must never be placed in front of an active airbag.
Child safety seats should be installed tightly; the seat should not move more than one inch side to side or front to back.
Booster seats should be used until the child is tall enough for the seat belt to fit properly, usually around 4'9" tall.
Anti-lock brakes (ABS) prevent wheel lockup; maintain firm pressure and steer during hard braking.
Electronic stability control (ESC) helps prevent skids by braking individual wheels and reducing engine power.
Traction control limits wheelspin during acceleration but does not improve cornering or braking.
Tire pressure monitoring systems (TPMS) alert when a tire is significantly underinflated; check tire pressure monthly with a gauge.
Emergency Procedures and Incident Response
If a tire blows out, hold the wheel firmly, ease off the accelerator, and steer straight; avoid hard braking.
If the brakes fail, pump the pedal, downshift, and apply the parking brake gradually; steer to a safe stop.
If the vehicle skids, look and steer where you want to go; ease off the accelerator and avoid sudden braking.
If the accelerator sticks, shift to neutral, brake firmly, and steer to a safe stop.
After a collision, stop, check for injuries, call 911, exchange information, and report to police as required.
If stranded, stay in the vehicle, turn on hazard lights, and call for help; do not walk in traffic.
If the vehicle catches fire, pull over, turn off the engine, get everyone out, and move at least 100 feet away.
If you are drowsy, stop and rest; cold air, music, or caffeine are only temporary remedies.
If you are stranded in cold weather, stay in the vehicle, run the engine intermittently for heat, and crack a window for ventilation.
Driving Privileges, Licensing, and Operating Regulations
A driver's license must be carried when driving and presented to law enforcement on request.
A learner's permit requires a licensed supervising driver in the front seat and restricts driving hours and passengers.
Graduated licensing systems restrict night driving and passenger counts for novice drivers.
Implied consent laws require submitting to a chemical test when lawfully requested after arrest for impaired driving; refusal carries license penalties.
The legal blood alcohol concentration limit for drivers 21 and older is commonly 0.08%; lower limits apply to underage or novice drivers.
Driving without a valid license, with a suspended license, or without required insurance is a separate offense.
Vehicle registration and proof of insurance must be carried or available in the vehicle.
Points assessed for moving violations accumulate on the driving record and can lead to suspension when a threshold is reached.
A driver must notify the licensing agency of a change of address within a specified period, often 10-30 days depending on the state.
Traffic Laws, Road Signs, Signals, and Markings
A red octagon means STOP; a red inverted triangle means YIELD; a red circle with a slash means prohibited.
Yellow diamond signs warn of hazards ahead; orange diamond signs mark construction or work zones.
A flashing red signal is treated as a stop sign; a flashing yellow means slow down and proceed with caution.
A solid yellow center line prohibits passing in either direction; a broken yellow line permits passing when safe and legal.
Double solid white lines separate lanes moving the same direction and may not be crossed except where law allows.
A steady red arrow means stop and do not turn in the arrow's direction; a green arrow grants a protected turn.
At a four-way stop, the first vehicle to stop proceeds first; if two arrive at the same time, the vehicle on the right goes first.
A round yellow sign with a black X and RR marks a railroad crossing; a white crossbuck also marks the crossing.
A pentagon-shaped sign marks a school zone or school crossing; a pennant-shaped sign marks a no-passing zone.
Safe Driving Practices, Hazard Awareness, and Defensive Driving
The three-second following rule: when the rear of the vehicle ahead passes a fixed object, you should not reach that object in less than three seconds in good conditions.
Add at least one second of following distance for each adverse condition (rain, darkness, heavy load, or a tailgater).
Total stopping distance = perception distance + reaction distance + braking distance; it rises with the square of speed.
Use the Smith System: Aim high in steering, Get the big picture, Keep your eyes moving, Leave yourself an out, Make sure others see you.
Space cushion rule: maintain a gap ahead, to the sides, and behind; if a tailgater closes behind, increase the gap ahead.
Hydroplaning begins when tire tread cannot clear water; it can occur at speeds as low as about 35 mph on wet pavement.
Scan 12-15 seconds ahead in urban areas and 20-30 seconds ahead on highways to identify hazards early.
At night, drive at a speed that lets you stop within the distance lit by your headlights.
When merging, match the speed of traffic and use the acceleration lane; do not stop at the end of the on-ramp unless traffic requires it.
Vehicle Controls, Pre-Drive Checks, and Basic Maintenance Awareness
Pre-drive walkaround checks tires for tread depth and pressure, lights for function, fluid leaks under the vehicle, and obstructions around the vehicle.
The minimum legal tread depth reference is 2/32 inch; the penny test (Lincoln's head visible) indicates tread at or near that limit.
Check engine oil with the engine off and the vehicle level; the level should fall between the MIN and MAX marks on the dipstick.
The parking brake should be set before starting the engine on a manual transmission and used whenever parked, especially on a slope.
Before moving, adjust seat, mirrors, and head restraint; the top of the head restraint should align with the top of the head.
Tire pressure is checked when tires are cold; underinflation increases rolling resistance, heat, and the risk of blowout.
Coolant is checked only when the engine is cold; opening a hot radiator cap can release scalding pressurized fluid.
Brake warning light, oil pressure light, and coolant temperature light indicate conditions requiring immediate stop and inspection.
The gear selector positions are typically P (park), R (reverse), N (neutral), D (drive), and L or S (low or sport).
Vehicle Safety Systems and Occupant Protection
A seat belt should be worn low across the hips and snug across the shoulder; the shoulder strap crosses the collarbone, never the neck.
Airbags supplement seat belts and do not replace them; an unbelted occupant can be injured by the deploying airbag.
Children under 13 should ride in the rear seat; rear-facing child seats must never be placed in front of an active frontal airbag.
Anti-lock brakes (ABS) prevent wheel lockup during hard braking; the correct technique is firm continuous pressure while steering.
Electronic stability control (ESC) reduces skidding by braking individual wheels and adjusting engine power; it cannot overcome excessive speed.
Traction control limits wheelspin during acceleration but does not improve cornering grip or shorten braking distance.
Head restraints reduce whiplash injury when positioned at the correct height and close to the back of the head.
Daytime running lights improve vehicle visibility to others but do not substitute for headlights at night.
Airbags deploy at speeds up to 200 mph and inflate in about 30 milliseconds; occupants must be positioned at least 10 inches from the steering wheel.
Emergency Procedures and Incident Response
If a tire blows out, hold the wheel firmly, ease off the accelerator, and avoid hard braking; steer straight while slowing gradually.
If brakes fail, pump the pedal, downshift, and apply the parking brake gradually; steer toward an uphill grade or open area to bleed speed.
If the vehicle begins to skid, look and steer where you want to go and avoid sudden braking; ease off the accelerator.
If the accelerator sticks, shift to neutral, brake firmly, and steer to a safe stop while keeping control.
After a collision: stop, check for injuries, call emergency services, exchange information, and report to police as required by law.
When stopped on a roadway, turn on hazard lights and place warning triangles or flares behind the vehicle if it is safe to do so.
If a vehicle stalls on railroad tracks, exit immediately and move away from the tracks at an angle toward the approaching train's direction of travel.
If you become drowsy while driving, the only reliable remedy is to stop and rest; cold air, music, or caffeine are temporary at best.
If you hit a parked car and cannot find the owner, leave a note with your name and contact information and report the incident to police if required.
Driving Privileges, Licensing, and Operating Regulations
A learner's permit typically requires a licensed supervising driver in the front seat and restricts driving hours and passengers.
Graduated licensing systems commonly restrict night driving and passenger counts for novice drivers until full licensure.
Driving is a privilege conditioned on holding a valid license for the vehicle class and obeying licensing restrictions.
Implied consent laws require submitting to a chemical test when lawfully requested after arrest for impaired driving; refusal carries license penalties.
The legal blood alcohol concentration limit for drivers 21 and older is commonly 0.08%; lower limits (often 0.00-0.02%) apply to underage or novice drivers.
Driving without a valid license, with a suspended license, or without required insurance is a separate offense from the underlying violation.
Vehicle registration and proof of insurance must be carried or available in the vehicle and produced on request by law enforcement.
Points assessed for moving violations accumulate on the driving record and can lead to suspension when a threshold is reached.
A restricted license may limit driving to certain hours, routes, or with corrective lenses; violating restrictions is a citable offense.
Traffic Laws, Road Signs, Signals, and Markings
A yellow X or diagonal arrow signal above a lane means that lane is closing or must be exited; a red X means the lane is closed.
A white diamond marking on the pavement indicates a high-occupancy vehicle (HOV) lane.
A solid white line at an intersection edge marks the stop line; stop behind it, not over it.
A yellow light means stop if you can do so safely; it does not mean accelerate to beat the red.
A left turn on red is permitted only from a one-way street onto another one-way street where state law allows it.
A right turn on red is permitted after a full stop and yield, unless a sign prohibits it.
A crosswalk with a pedestrian present requires yielding; the pedestrian in the crosswalk has the right of way.
A no-parking zone marked by a yellow curb generally prohibits stopping, standing, or parking depending on local signage.
A stop sign at a railroad crossing requires stopping before the tracks and checking both directions before proceeding.
Safe Driving Practices, Hazard Awareness, and Defensive Driving
The two-second rule is the minimum following distance in ideal conditions; three seconds is recommended for most drivers.
Use the IPDE process: Identify, Predict, Decide, Execute to handle hazards systematically.
Blind spots should be checked by turning the head, not just the mirrors; mirrors do not cover all areas around the vehicle.
When passing, check mirrors and blind spot, signal, accelerate smoothly, and return to the lane only when the passed vehicle is visible in the mirror.
In fog, use low beams; high beams reflect off the fog and reduce visibility.
In rain, reduce speed and increase following distance; wet roads can double stopping distance.
At intersections, scan left-right-left before proceeding; do not assume other drivers will stop or yield.
When an emergency vehicle approaches with lights and siren, pull to the right and stop until it passes.
When approaching a work zone, slow down, merge early, and follow flagger instructions; fines are often doubled in work zones.
Vehicle Controls, Pre-Drive Checks, and Basic Maintenance Awareness
The accelerator pedal increases speed; the brake pedal slows or stops the vehicle; the clutch pedal (manual) disengages the engine from the transmission.
Turn signals should be activated at least 100 feet before a turn in urban areas and 200 feet on highways, per common state rules.
Headlights should be on from sunset to sunrise and whenever visibility is reduced, such as in rain, fog, or snow.
The horn should be used only to warn others of danger, not to express frustration.
Check the spare tire, jack, and lug wrench are present and functional before long trips.
The engine coolant reservoir level should be checked when the engine is cold; low coolant can cause overheating.
Wiper blades should be replaced when they streak or chatter; worn blades reduce visibility in rain.
The battery should be checked for corrosion and secure mounting; a loose battery can cause electrical failure.
Check tire pressure monthly and before long trips; underinflation increases wear, heat, and the risk of blowout.
Vehicle Safety Systems and Occupant Protection
Seat belts are the single most effective occupant protection device; they reduce the risk of fatal injury by about 45% in front seats.
Child safety seats should be installed in the rear seat and secured with the seat belt or LATCH system; the seat should not move more than one inch side to side.
Rear-facing child seats should be used until the child reaches the seat's height or weight limit, typically age 1-2 and beyond.
Booster seats raise the child so the seat belt fits properly; children should use a booster until the seat belt fits without it, usually around age 8-12 or 4'9" tall.
Tire pressure monitoring systems (TPMS) alert the driver when a tire is significantly underinflated; they do not replace manual checks.
The tire placard on the driver's door jamb lists the recommended cold tire pressure; this is the correct reference, not the number on the tire sidewall.
Backup cameras and sensors assist but do not replace checking mirrors and turning to look behind before reversing.
Anti-lock brakes should not be pumped; maintain firm pressure and steer while the system pulses.
Traction control limits wheelspin during acceleration but does not improve cornering grip or shorten braking distance.
Emergency Procedures and Incident Response
If the steering fails, grip the wheel firmly, slow gradually, and pull off the road; do not slam on the brakes.
If a headlight fails at night, use the remaining light and any auxiliary lights, reduce speed, and stop as soon as safe.
If the hood flies up while driving, look through the gap under the hood or out the side window and pull over safely.
If you are involved in a collision, move the vehicle out of traffic if it is safe and there are no injuries requiring it to stay.
If your vehicle catches fire, pull over, turn off the engine, get everyone out, and move at least 100 feet away; do not open the hood.
If you are stranded in cold weather, stay in the vehicle, run the engine intermittently for heat, and crack a window for ventilation.
If you are stranded in hot weather, stay in the vehicle or shade, drink water, and avoid overexertion.
Call 911 for emergencies; provide location, number of people involved, and nature of injuries.
If a vehicle stalls on railroad tracks, exit immediately and move away from the tracks at an angle toward the approaching train's direction of travel.
Driving Privileges, Licensing, and Operating Regulations
A driver's license must be carried when driving and presented to law enforcement on request.
License classes vary by vehicle type; a standard passenger vehicle license does not authorize driving a commercial truck or motorcycle without the proper endorsement.
A driver must notify the licensing agency of a change of address within a specified period, often 10-30 days depending on the state.
A driver must report a collision to the licensing agency when it involves injury, death, or property damage above a threshold set by state law.
Driving while license suspended or revoked is a serious offense that can result in vehicle impoundment and jail time.
A driver must have liability insurance meeting the state's minimum coverage limits; driving uninsured is illegal and can result in license suspension.
A driver must yield to pedestrians and cyclists and follow all traffic control devices, including those in work zones where penalties are often doubled.
A driver must not use a handheld phone while driving in many jurisdictions; hands-free laws vary by state.
A driver must report a collision to the licensing agency when it involves injury, death, or property damage above a threshold set by state law.
Traffic Laws, Road Signs, Signals, and Markings
A green light means proceed when safe, but you must still yield to pedestrians and vehicles already in the intersection.
A yellow light is a warning that the signal is about to turn red; you should stop if you can do so safely.
A red light means stop; you may turn right on red after a full stop and yield unless a sign prohibits it.
A stop sign requires a full stop at the stop line or before the crosswalk; rolling stops are illegal.
A yield sign requires slowing and yielding the right of way to traffic on the intersecting road.
A roundabout requires yielding to traffic already in the circle; do not stop inside the roundabout.
A school bus with flashing red lights and extended stop arm requires traffic in both directions to stop until the lights stop flashing, unless divided by a median.
A solid white line at an intersection edge marks the stop line; stop behind it, not over it.
A white diamond marking on the pavement indicates a high-occupancy vehicle (HOV) lane.
Safe Driving Practices, Hazard Awareness, and Defensive Driving
The three-second rule is the minimum following distance in good conditions; increase to four or more seconds in rain, snow, or darkness.
Total stopping distance increases with speed; at 60 mph, a typical car needs about 300 feet to stop on dry pavement.
Perception-reaction time is typically 1.5 seconds; at 60 mph, the vehicle travels about 132 feet before the brakes are applied.
Hydroplaning occurs when water on the road is deeper than the tire tread; reduce speed and avoid sudden braking in heavy rain.
Use low beams in fog, rain, or snow; high beams reflect off precipitation and reduce visibility.
When a vehicle is tailgating, increase your following distance ahead so you can brake gradually and reduce the risk of a rear-end collision.
When driving at night, reduce speed and increase following distance; visibility is limited to the reach of your headlights.
When an emergency vehicle approaches, pull to the right and stop; do not block intersections.
When merging, match the speed of traffic and use the acceleration lane; do not stop at the end of the on-ramp unless traffic requires it.
Vehicle Controls, Pre-Drive Checks, and Basic Maintenance Awareness
Before driving, check that all occupants are buckled, mirrors are adjusted, and the seat is positioned so you can reach the pedals comfortably.
The parking brake should be set before starting the engine and released before driving; driving with it engaged can damage the brakes.
Turn signals should be used for all lane changes and turns; signal at least 100 feet before a turn in urban areas.
Headlights should be on from sunset to sunrise and in adverse weather; use low beams when approaching other vehicles.
Check tire pressure monthly and before long trips; underinflation increases wear, heat, and the risk of blowout.
Check the oil level with the engine off and the vehicle on level ground; add oil if the level is below the minimum mark.
Check the coolant level only when the engine is cold; never open a hot radiator cap.
Replace wiper blades when they streak or chatter; check washer fluid regularly.
The battery should be checked for corrosion and secure mounting; a loose battery can cause electrical failure.
Vehicle Safety Systems and Occupant Protection
Seat belts reduce the risk of fatal injury by about 45% in front seats and by about 60% in light trucks.
Airbags are supplemental restraints; they are designed to work with seat belts, not replace them.
Children under 13 should ride in the back seat; rear-facing child seats must never be placed in front of an active airbag.
Child safety seats should be installed tightly; the seat should not move more than one inch side to side or front to back.
Booster seats should be used until the child is tall enough for the seat belt to fit properly, usually around 4'9" tall.
Anti-lock brakes (ABS) prevent wheel lockup; maintain firm pressure and steer during hard braking.
Electronic stability control (ESC) helps prevent skids by braking individual wheels and reducing engine power.
Traction control limits wheelspin during acceleration but does not improve cornering or braking.
Tire pressure monitoring systems (TPMS) alert when a tire is significantly underinflated; check tire pressure monthly with a gauge.
Emergency Procedures and Incident Response
If a tire blows out, hold the wheel firmly, ease off the accelerator, and steer straight; avoid hard braking.
If the brakes fail, pump the pedal, downshift, and apply the parking brake gradually; steer to a safe stop.
If the vehicle skids, look and steer where you want to go; ease off the accelerator and avoid sudden braking.
If the accelerator sticks, shift to neutral, brake firmly, and steer to a safe stop.
After a collision, stop, check for injuries, call 911, exchange information, and report to police as required.
If stranded, stay in the vehicle, turn on hazard lights, and call for help; do not walk in traffic.
If the vehicle catches fire, pull over, turn off the engine, get everyone out, and move at least 100 feet away.
If you are drowsy, stop and rest; cold air, music, or caffeine are only temporary remedies.
If you are stranded in cold weather, stay in the vehicle, run the engine intermittently for heat, and crack a window for ventilation.
Driving Privileges, Licensing, and Operating Regulations
A driver's license must be carried when driving and presented to law enforcement on request.
A learner's permit requires a licensed supervising driver in the front seat and restricts driving hours and passengers.
Graduated licensing systems restrict night driving and passenger counts for novice drivers.
Implied consent laws require submitting to a chemical test when lawfully requested after arrest for impaired driving; refusal carries license penalties.
The legal blood alcohol concentration limit for drivers 21 and older is commonly 0.08%; lower limits apply to underage or novice drivers.
Driving without a valid license, with a suspended license, or without required insurance is a separate offense.
Vehicle registration and proof of insurance must be carried or available in the vehicle.
Points assessed for moving violations accumulate on the driving record and can lead to suspension when a threshold is reached.
A driver must notify the licensing agency of a change of address within a specified period, often 10-30 days depending on the state.