Loudoun County Public Schools / Overview



Module 9: Topic 1Visibility5264785100330001. Driving at Night:Dirt on the lens of headlights can reduce light by up to 90 percent.How can you check to see if the lights are working properly? Answer: Use the reflection when parked behind a car or in front of a garage doorHow far do high beams let us see?Answer: More than 250 feetWhat is the sight distance rule?Answer: We have to be able to stop in the distance we can see?When driving at night, drivers need to leave more space than they would in the daytime.2. Visibility:The distance a driver can see ahead is limited and headlights do not illuminate off-road areas.Visibility is also compromised by the glare from other vehicles.1035050151765003. Headlights:High beam headlightsUsed when safe and legal at speeds of 55 – 60 mphLow beam headlights Used in bad weather or when following or meeting another car at night - safe at speed of 40 – 45 mph4. Night Driving Skills:Adjust speed to distance illuminated by headlightsKeep your eyes moving searching ahead and at edges of the roadwayFlash lights once quickly if oncoming vehicle is using high beams5. Night Driving Risks:Reduces ability to see risksRequires eyes to adjust quickly to glarePlaces limitations on gathering and processing information in timeThe distance you can see ahead is shorter - especially at higher speedsHeadlights provide little illumination of off-road areasAbility to judge distances is compromisedThe glare from oncoming and following vehicles impairs visionMust drive “blind” while recovering from the glare6. Driving Tips for Poor Visibility:Reduce speed to accommodate shortened sight distanceUse emergency flashers when traveling below speed limitMaintain appropriate lane position If stopping distance longer than sight distance, slow down and don’t drive “blindly” into the darkness.7. Safety Tips for Driving at Night:Before passing, the driver passing can flash his/her headlights to warn the other driver.When two vehicles are side by side, the passing driver may switch to high beams and the driver being passed should switch to low beams.Be alert for pedestrians walking on unlighted roadways . If you must walk on a dark roadway due to vehicle breakdown or another reason, carry a white handkerchief or wear light-colored clothing or reflective clothing to increase your chances of being seen.In snow, wear dark clothing to create a contrast.Module 9: Topic 2Severe Weather Conditions342011076200001. Drifting Fog:Reduce speedTurn on low beam headlights Turn on windshield wipersTurn on defroster or air conditioner2. Heavy Fog:Reduce speedTurn on emergency flashers and fog lightsNEVER stop in a travel laneLook for an exit from the highwayIf impossible to leave the highway, stop beyond the end of guardrail as far to the right of the road as possible, and turn off lights and wait for fog to lift.4435475133985003. Visibility Limited by Rain and Snow:Keep headlights cleanTurn on the defroster to remove ice and condensation Clear the windshield and rear windowsReduce SpeedTurn headlights to low beamTurn on windshield wipersBe alert for vehicles stopped in roadwayBe prepared for effects of gusting windsMake adjustments gently and smoothly4. Sources of GlareOther vehicle headlightsPaper on the dashboardSnow covered landscapeThe sun at dawn or dusk3960495139065005. Reducing GlareLook to the right edge of roadwayDo not place paper on dashboardWear sunglasses during the dayAdjust sun visors and mirrorsClean window6. Describe how the conditions listed below affect a driver’s ability to see and what adjustment a driver should make to better cope with these conditions:Sun glare:Driving at night:Fog:Rain:Snow:450151591440007. Driving in Snow:In severe snow conditions look for an exit on highwayCheck weather report If impossible to leave highway, stop beyond outboard end of guard rail Use cell phone to check conditionsSnow may require use of windshield washer fluid8. Strong Winds:Keep a firm grip on the steering wheel277622016129000Reduce speedAdjust lane positionDo not over steerStay off the brakePrepare to counter steerMake all steering, accelerating, and braking actions gently and smoothlyCheck for debris in roadway and oncoming traffic9. Low water crossings:47567855016500Flash flooding conditions are unpredictableNot specific to a time of yearAffects braking, steering and engine systems10. Flash Flood Dangers:Nearly 50% of flash flood fatalities are vehicle related Search for flood prone areas: Highway dipsBridgesLow areas Most vehicles will float Very little water on the road surface can cause loss of controlTwo feet of water will “carry” most carsBecause visibility is limited at night, driving during flooding conditions is very dangerousHeed all flash flood watches and warningsMonitor road conditions through the news media11. Hot and Cold Temperatures:Vehicles are designed to operate in a wide range of temperatures, from very hot to extremely cold.Extreme conditions cause stress on vehicle parts sensitive to temperature changeMake sure to check tires, fluids, and belts3562350-990600012. Cold Weather Driving Tips:Check your batteryCheck your cooling systemCheck your windshield wipers Check your tire treadCheck your gasCheck your windshield washer reservoirCheck radiator coolant, hoses, and connectionsClean snow off of your entire car13. Hot weather checks Underinflated tires are subject to excessive flexion causing pressure buildup, especially when driving for extended distances at higher speeds.440817023749000The air conditioner, radiator coolant hoses, connections, and drive belts need special attention due to the extra load placed on these cooling systems.Module 9: Topic 3Occupant Protection1. Occupant Protection:Occupant protection refers to safety features designed to protect occupants of motor vehicles in the event of a crash. These systems can be 'active' or ‘passive.’Wearing a safety belt is your best defense for preventing severe life-altering injuries:Slows occupant’s rate of deceleration in a frontal crash and keeps occupants securely in place2844800174625002. Airbags:The driver side airbag is located in the center of the steering wheel and the passenger side airbag is located inside the dashboard. Side airbags that inflate during side collisions are usually located within the seat. CCurtain airbags are installed above the side windows, in the headliner, on both sides. Knee airbags are located in front of the legs of the driver and front seat passenger. They are concealed within the steering column or the lower part of the dashboard and deploy during frontal impacts.Driver and front passenger air bags are designed to inflate in a frontal impact. Drivers should sit at least 10 inches from the air bag because it inflates to six or seven inches in size at speeds up to 200 mph. If you can, tilt the steering wheel to point the air bags at your chest, not your face.Always wear a safety belt and secure children in the rear seat. To reduce forearm and hand injuries, place hands on the lower half of the steering wheel, with knuckles on the outside and thumbs along the inside of the rim of the wheel.Side impact air bags are designed to protect the torso and head in side impact collisions. Care should be taken not to sit too close to the door or to lean towards the air bag.3. How do you adjust your seat and steering wheel hand position to protect you from the airbag?4. We learned in Module 2 that adjusting the head restraints protects us from whiplash.Module 9: Topic 4Highway Safety Design 1. Roadway Safety Design:Breakaway sign support posts11182352603500Guard rails with ends angled away from roadway and buried10521958001000451802515240000Crash attenuators - such as vinyl liquid or sand filled drums28098757620000Protected left and right turn baysCollector/distributor lanes on high speed, high density highways 21837656604000Variable message signs alerting drivers to weather conditions, construction, and traffic problems23749005397500Module 9: Topic 5Vehicle Design and Technology1. How do you think vehicle design and technology make a vehicle safer?2. New Advances:All-wheel driveAntilock braking systems Electronic stability control Telematics (i.e. OnStar) Tire pressure monitoringActive head restraints Adaptive cruise control Adaptive headlights Advanced airbags Advanced seat belt pre tensionerFatigue warning Forward collision warning systems Lane departure warning systems Side view assistPark assist and back over prevention3. In Module 3 we learned about anti lock braking systems (ABS).What is the primary task of ABS?Answer: accident avoidanceWhat are the ABS rules?Answer: Stomp on the brake pedal, stay on the brakes, steer where you want to goWhat may you notice when using ABS brakes?Answer: You may hear a noise and feel the pedal vibrate4. Electronic Stability System (ESP):What is the electronic stability program designed to do?Answer: Avoid accidents and prevent a vehicle from skidding and slidingDuring an over-steering or skidding condition (rear-wheel lock-up), the ESP system applies the brake to which wheel?Answer: The outer front wheelDuring an under-steering or sliding condition (front-wheel lock-up), the ESP system applies the brake to which wheel?Answer: The inner rear wheel 5. Functions of Tires:Tires are air-filled cushions designed to reduce the effect of road hazards and irregularities on the vehicle and are designed to flex and give as they meet the road surface.Absorb shocks caused by road hazards Provide Traction — enables drivers to accelerate, brake and steerTires ratings are indicated on the sidewall of the tire 6. Traction:Measured by the ability to stop a car in straight-ahead motion on a wet surface - tires graded A have the best traction performance, B grading is an above average rating and C indicates the tire meets government standards.Temperature —tire’s ability to withstand heat. Tires graded A are the most heat-resistant and less likely to suffer a blowout under the same conditions as tires with grades of B or C.Treadwear rating — the higher the treadwear rating, the greater the mileage – a tire with a treadwear rating of 150 is expected to last 50 percent longer than one graded at 100.7. After watching the tire safety video, list 3 things you learned about tires.49847503048000Module 9: Topic 6Dangerous Road Conditions1. Dangerous Road Conditions:Ice, snow, or frost/sleetWet--particularly the first 15 minutes of rain after a long dry period when oil and rubber particles have collected on the road surface and mix with waterHeavy rain or standing water Mud near farm entrances, construction sites, and truck crossingsWet leavesBroken or uneven road surfaceSand or gravel - frequently found on curves in rural areas2. Slippery Conditions:45377104127500Ice on the roadDangerous curves and turnsRoads with slippery when wet warning signs Most dangerous when the temperature is near freezingJust after a rain has fallen on a hot dayHeavily traveled intersections when raining3. Controlling Consequences:Drive off road rather than skid off the roadHit something soft rather than something hard Hit something going your way rather than something stationaryHit stationary objects with a glancing blowHit a stationary object rather than an approaching objectSteer to avoid oncoming traffic and head on collision4. Preventing Loss of Traction:Reduce speed Increase spaceMake gradual changes to speedAvoid abrupt changes in directionFind the best path5. Causes of Traction LossRoad surface conditionsThe condition of the vehicle Actions of the driver6. Signs of Hydroplaning:Standing waterRaindrops that bubble when they hit the roadSlushing soundSensation that the steering wheel is loose or disconnected from the vehicle A vehicle ahead that is not leaving a track 7. Preventing Hydroplaning:Slow down when there is water standing on the surface of the pavement.Tires should be properly inflated and have adequate tread.Increase following distance, particularly when behind a large truck.Drive in the tracks left by any vehicle ahead.8. If Hydroplaning Occurs:Ease off the accelerator graduallyDecrease speed until your tires regain traction.Do not brake until traction has been restored.Steer no more than necessary, continue to look and steer where you want to go.9. What do you know about skids?When do most skids occur?Answer: From braking too hard on a slippery surface, turning too quickly and trying to accelerate too rapidlyWhat are the steps to recover from a skid?Answer: Foot off brake or accelerator. Turn vehicle in desired direction. Before the car straightens out, counter-steer the other way. Continue doing so until the vehicle is straight aheadWhat is the best way to handle skids?Answer: Avoid slippery surfaces. Adjust speed to conditions. Be gentle using brake, accelerator and steering wheel.10. Causes of SkidsSlippery surfacesAccelerating too hard Braking too hardSteering too much or too quicklyEntering a curve with too much speed11. Preventing skids:Apply the brakes in a smooth and progressive mannerMake smooth, precise steering wheel movementsSlowing down well in advance of curvesMaintaining speeds appropriate for conditions12. Types of skids:There are two main types of skidding: over-steering (fishtailing)under-steering (plowing)13. Front wheel loss of traction:a. Called “Understeer” and is when the vehicle moves straight ahead in spite of steering input36334708445500Look and steer toward intended path Smoothly ease up on acceleratorSmoothly apply brakes to regain traction Do not steer more than necessary14. When Brakes are Applied Too Hard or Too Quickly:Vehicle weight shifts to the front causing: A noticeable drop of the hood A noticeable rise of the rear Forward movement of driver, passengers and items in vehicle15. Correcting Front Traction Loss:Direct vision to targeted path of travel (look where you want to go)Activate ABS (if vehicle equipped)Ease off conventional brake systemReestablish rolling traction (wheels rolling/not sliding)Ease off steering inputsAbrupt steering can create traction lossSteer toward intended path of travel Jab/Stab brake to move weight forward if no ABS (ABS performs this function automatically)16. Rear-Wheel Loss of Traction:This is called an “over steer” when vehicle moves sideways without any additional steering input-9207511049000Look and steer toward intended path Ease off the accelerator and avoid using the brakesContinue to steer and counter-steer until the vehicle is traveling straightUse a light and progressive acceleration if the vehicle does not recover 17 Acceleration and Traction Loss:a. When acceleration is applied too hard or too quickly weight moves to the rear of the car causing:A noticeable rise of the hood A noticeable drop of the rear Rearward movement of driver and passengers18. Causes of Traction Loss:Brakes unevenly adjusted - Brakes pulling in one direction or the other can cause a skid - as can wheels that are out of alignment when brakes are appliedUnevenly worn tire treadThe size of the front and rear tires do not match.The tread depth or the front and rear tire type are not the same.19. Driver Actions that Cause Loss of Traction:Sudden steering movements on a slippery surfaceAbrupt and sudden changes in vehicle speedPanic stop or applying the brakes too hard on a hill, curve or slippery surfaceSuddenly engaging the clutch on a slippery surface20. Traction Loss – Shifts in Vehicle Weight:Sudden shifts of vehicle weight (left, right, forward or backward) will cause loss of traction. Simultaneous steering, braking and/or acceleration creates sudden shifts in vehicle balance. 21. When Steering is Applied Too Hard or Quickly Weight Moves to the Opposite Side of the Car:Vehicle weight shift causes: A noticeable drop and tilt of the hood A noticeable rise and tilt of the rear Driver, passenger, items in car move towards the car’s corner22. Managing Rear Traction Loss:a. Look at desired/targeted path of travelb. Activate traction control system orEase off brake or acceleratorReestablish rolling traction to rear wheelsSteer toward targeted path of travelApply light progressive acceleration (2 mph is goal) to shift weight to the Rear Traction control system will adjust the speed/braking automatically when activated)Module 9: Topic 7Emergency Recovery & Controlling Consequences1. What do you think causes run off the road crashes?2. Run-Off the Road Crashes: Recognize, React, And RecoverWhat are some reasons run-off the road crashes occur? Answer: Driving too fast for conditions, not paying attention, driving in rural areasWhat increases the risk of being in a run-off the road crash? Answer: Driving at nightWhat is the #1 tip from America’s best drivers when it comes to run-off the road crashes? Answer: Don’t overreactWhat steps should you take if you run-off the road? Answer: Keep a firm grip on the steering wheel. Stay off the brake and gas. Check for traffic. Reduce Speed. Align off road wheels with the road (straddle the road). Steer back onto the road with small Inputs.3. Causes of Run Off the Road Crashes:Inattention or distractionsDrowsiness Steers onto the shoulder to avoid a collision and tries to return to the roadwayVehicle may collide with a vehicle in the next lane, or drive off the far side of the road4. Off road recoveryTo return to the pavement safely:Keep a firm grip on the steering wheelSlow down, ease off the accelerator and allow the vehicle to slow gradually - avoid braking Straddle the edge of the pavement, after speed is reduced and there is a gap in traffic .Steer back to the road with small inputs, do not over steer Return to the pavement two wheels at a time, as soon as the front tire is back on the roadway, counter-steer quickly left or right as necessary to stay in the correct laneBlocked Roadside: If an object beside the road such as a tree, bridge abutment or pedestrian forces the driver to return to the road quickly, he/she has little time to slow down, to do this the driver should:Steer left or right so the off-road wheels are about 12 inches away from the edge of the pavementRemove his/her foot from the accelerator and stay off the brakes. Turn the steering wheel quickly about one-eighth turn toward the roadwayImmediately, as the outer wheel makes contact with the edge of the pavement, counter-steer about a quarter turn and make steering corrections to straighten vehicle.5. Reminders:a. Do not panic and steer abruptlyb. Ease off accelerator DO NOT BRAKEGet both wheels off the pavementSteer the vehicle parallel to the roadwayIf clear, ease back on to the roadway one wheel at a timeLimit steering inputs to less than 1/8 of a turn of the wheel Use even less input when edge of road is highTarget the center of the adjacent lane to avoid a “Slingshot” maneuver into oncoming traffic6. Evasive Maneuvers:With ABS brakes, how can you stop quickly? Answer: Press down hard on the brake pedalWhat is the safest maneuver if there is enough room? Answer: Braking? c. What are the steps for making quick turns? Answer: Turn the wheel ? circle, full circle in the other direction and back to the middled. If there is a car beside you in the left lane and you need to avoid a car ahead, what should you do? Answer: Stop quickly or swerve to the right?7. When do you use Evasive Steering?When there is space to the sideWhen stopping distance is questionableWhen there are cars close behind8. Procedures for Evasive Steering:Turn the wheel 180 degreesCounter-steer immediatelyTurn the wheel back to the original straight-ahead position 9. Evasive Braking:If the vehicle has ABS:Firmly press brake pedal until the vehicle stopsMay feel pedal pulse back against foot b. If the vehicle does not have ABS:Apply firm, steady pressure just short of lockupEase up on brakes if wheels lock, then apply the brakes again 10. Evasive Acceleration:Used less frequentlyCan be used to avoid crashes at intersections and in merging situationsMay move point of impact to rear of vehicle if you can’t get out of the way 11. Controlling ConsequencesAvoid head-on collisionsDrive off the road rather than skid off the roadHit something softerHit something going in the same directionHit stationary object with glancing blowHit stationary object rather than approaching objectModule 9: Topic 8Reporting Crashes1. What are the four things that need to be done in the event of a crash? Answer: Protect the scene, call for help, take care of injured, report the accidenta. What should you do to protect the scene? Answer: Get cars off the road, if possible, warn approaching drivers b. What should you do to take care of anyone who is injured?Answer: Try to make them as comfortable as possible, see if there is someone with medical experience around, keep injury from getting worse, move the person no more than is necessary to avoid danger from traffic or fire c. What information should you get from the other driver if involved in a crash?Answer: Name, address, phone number, driver’s license #, vehicle tag number, insurance company, name and telephone number of witnesses2. What should you do?Stop immediatelyAid the injuredPrevent further damageSend for policeExchange information Record witnesses’ names and addressesNotify insurance agent ................
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