Roll Over Power Point Advanced Edu Safety Gew 6 10 09
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Transcript of Roll Over Power Point Advanced Edu Safety Gew 6 10 09
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Accident PreventionTank Truck Rollover
andRear End Crashes
Advanced Education in Rollover and Rear end Crashes Safety
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Accident Prevention Rollover & Rear End
CrashesAdvanced Education In Safety
DRIVER AND PUBLIC
SAFETY
COMES FIRST
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Rollover Prevention Our unified cause for keeping the roadways and highways safe is the
application of educating those that transport our many commodities through and across the united states. With out this unified effort to educate quality driving habits to prevent accidents and rollovers our
ability to have Safety First is diminished and lives are at risk.
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Potential Causes of RolloversExcessive SpeedLiquid MovementErratic maneuverLack of education in good,
Safe and defensive driving habits.
Being in a hurryMaintenance issuesWeather and road conditions
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Here are some facts to ponder
Vehicle Stability Depends on these factors Center of Gravity Distance Between Wheels Liquid Movement Speed change / Serge / Momentum
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Centrifugal Force or CF
Is the force working sideways on a moving vehicle
Increases by the square of the speeddouble the speed = 2 squared (4) X the CF3 X the Speed = 3 squared (9) X the CF
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Four Major Factors Contribute to a Rollover
High Center of Gravity Radius of CurveSlope of the RoadwaySpeed of the vehicle
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High Center of Gravity
The higher the Center of Gravity of a vehicle and its load, the easier it is for the force of gravity to move outside the foot print of the vehicle that is traveling at the speed that will be the causal factor for the rollover to take place.
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Seeing and recalling situations in the passed that I was involved in as an investigator always came up with stifling proof that these factors along with others were the underlying factors that contributed to the situation.
1. Speed
2. Being hurried for a signal light while turning or Lane change at intersection or Highway.
3. Liquid load serge
4. Other outside factors (A motorist)
5. Alcohol / Drugs
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Potential of life that can be lost, property damage can cost thousands, Insurance costs go up, customers and potential customers can be lost.
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Radius of Curve
The shorter or “tighter” the radius of curve, the greater the side force to “pull” the trailer over! “ROLLOVER”
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Slope of the Roadway
The greater the slope or “crown” of the roadway the easier it is for the force of gravity to be outside the foot print of the vehicle “ROLLOVER”
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Speed
Most influential factor Centrifugal Force increase in an amount
equal to the square of the vehicle’s speed Results in decreased driver response time
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Driver Control
High Center of Gravity NoneRadius of Curve Route
selectionSlope of Roadway Route
selectionSpeed Significant
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Driver’s Guidelines: Turns & Curves
Posted Curves
On sharp, curved roadways the safe speed
for tractor-trailers is 10 MPH below the posted warning entry or exit speed limits.
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Driver’s Guidelines: Turns & Curves
Unmarked CurvesOn sharp, curved roadways which are not-posted,
the safe speed for tractor-trailers is 10 MPH !
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Speed Cushion
As the SPACE cushion is the separation in
distance between vehicles, the SPEED cushion is the separation in MPH between ROLLOVER speed and a safe maneuvering speed within a curve.
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Unsafe ManeuveringSudden evasive maneuvers have a high potential for rollover. Hard braking and sudden turning to avoid an obstacle or small car has resulted in numerous rollovers.
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Unsafe Maneuvering
Side to side lane changes cause the liquid movement to ”come into phase” with the vehicle movement. This results in a lower rollover speed.
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Defensive Driving PrinciplesAim High in Your SteeringGet the Big PictureKeep Your Eyes MovingLeave Yourself an OutMake Sure They See You
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Defensive Driving Principles
What causes rear end collisions?
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Leave Yourself an Out
Awareness
Vehicle Position
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SPEED CUSHION
IS THIIS THE ANSWER ?(Hand Outs)
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Being in a Hurry!
Signal LightsOff RampsOn RampsLane ChangesNarrow Road Travel
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What is our answer to this education we have just seen?
Slow downBe a smart cautious driverBe educated on the latest techniques
of defensive driving (Smith System)Ask for help and broadcast it if others
need help.