1. Information Processing: Complex Risk Environments
Section 5 (Day 5)
Information Processing: Complex Risk Environments

2. Bell Ringer #5
Write a half a page red to red on the below statement. Save these to be turn in on test day. 10% of your grade
It is sometimes said that borrowing money from a friend can harm or damage the friendship. Do you agree? Why or why not? Use reasons and specific examples to explain your answer.

3. Reminder Don’t forget to do daily quizzes on QUIA.COM
Bring paper/pen/pencil and notebook
Electronics are for instructional use with permission
Don’t forget to do daily quizzes on QUIA.COM
No Excuses why you don’t take Quizzes 1-6
before test day!! (Quizzes are worth 30% of grade)
Attendance is MANDATORY!! (NO SLEEPING in class)
All notes can be found on Harrisonburg’s staff website:
If you are NOT taking notes in class, please be quiet and ask to use the restroom at the end of class.

4. This is what you are trying to get at the end of class..
“Green Card”
Your Name Here
Harrisonburg High School
H.C.P.S 36 x
03/06/2012
This is what you are trying to get at the end of class..

5. Objectives: (Day 5) Students will understand three types of traction
Students will understand driving on dangerous road surface conditions
Students will understand traction loss considerations
Students will understand driving off-road and recovery

6. Traction Traction is the grip between the tires and the road surface
Traction allows a vehicle to start, stop, and/or change direction.

7. Traction Traction can be lost to the front tires or the rear tires.
If the front and rear tires are actually leading the vehicle (sideways traction loss).

8. Traction

9. Static Traction
A stationary vehicle parked on a flat surface with its brakes set is an example of static traction.
It has the greatest resistance to movement.

10. Rolling Traction
More traction between a rolling wheel and the road than there is between a sliding wheel and the road.
Keep the wheels rolling and not lock the brakes when trying to steer or stop a vehicle that is sliding.

11. Sliding Traction
There is greater traction between a stationary wheel and the road than there is between a sliding wheel and the road.
Sliding traction does not grip the road.

12. Dangerous Road Surface Conditions
Ice
Ice, snow, or frost
Wet--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 water
Heavy rain or standing water
Mud near farm entrances, construction sites, and truck crossings
Rain
Snow
Mud

13. Dangerous Road Surface Conditions
Wet leaves
Broken or uneven road surface
Sand or gravel frequently found on curves in rural areas
On improperly banked or flat curves, traction is more likely to be lost when roads are wet or slippery at slow speeds, or when dry at higher speeds
NEGATIVE BANK

14. Causes of Traction Loss
Condition of the Vehicle
Brakes unevenly adjusted
Brakes pulling in one direction
Tires with unevenly worn tread
Different tire pressure on opposite sides of the vehicle.

15. Causes of Traction Loss
Driver Actions that may cause loss of traction
Sudden steering actions
Sudden changes in vehicle speed
Panic stop or applying the brakes too hard
Suddenly engaging the clutch
Loss of traction also occurs with these driver’s actions at normal speeds on ice/snow or on roadways covered by sand, gravel, or water

16. Traction Loss Considerations
Sudden shifts of vehicle weight causes traction loss
- steering, braking and/or acceleration
DROPS
LIFTS

17. Traction Loss Considerations Force or Weight Movement
When Brakes are Applied Too Hard or Quickly
Weight Moves to the Front of the Car Causing
a noticeable drop of the hood
a noticeable rise of the rear deck
forward movement of driver and passengers
Rear LIFTS
Front DROPS
Force or Weight Movement
Direction of Travel

18. Traction Loss Consideration
When Acceleration is Applied Too Hard or Quickly
Weight Moves to the Rear of the Car Causing
a noticeable rise of the hood
a noticeable drop of the rear deck
rearward movement of driver and passengers
Rear DROPS
Front LIFTS
Force or Weight Movement
Direction of Travel

19. Traction Loss Consideration Force or Weight Movement
When Steering is Applied Too Hard or Quickly
Weight Moves to the Opposite Side of the Car
Weight Movement Causes:
a noticeable drop and tilt of the hood
a noticeable rise and tilt of the rear deck
driver and passenger movement towards the car’s corner
Force or Weight Movement
Front DROPS
Rear LIFTS
Direction of Travel

20. Traction
Traction between the tires and the road does not remain constant.
For example, sand, gravel, or water on the road decreases the level of traction.
As speed increases, traction between the tires and the road decreases. With decreased traction, the possibility of skidding or sliding increases.
DO NOT WRITE THIS SLIDE

21. Recognize Traction Loss
The driver must recognize which part of the vehicle is losing traction in order to activate the technology needed to correct the problem.

22. Traction Loss to Front Tires
If A Vehicle Keeps Moving Straight Ahead in Spite of Steering Efforts To the Contrary
The Technical Term is Called “Understeer”
front tires SLIDE
rear tires PUSH
Intended Path of Travel
Actual Path of Travel

23. To Correct Front Traction Loss
Intended Path of Travel
Actual Path of Travel
Activate ABS
Steer Toward Targeted Path of Travel
Adjust Steering Input as Needed to Maintain Targeted Path of Travel

24. Traction Loss to Rear Tires
Identified by driver when front of vehicle moves to the left or right of travel path without steering input in that direction
Technical term is “Oversteer”
front tires ROLL
rear tires SLIDE
Intended Path of Travel
Actual Path of Travel

25. Rear Traction Loss Correction
Intended Path of Travel
Actual Path of Travel
Steer Toward Targeted Path of Travel
Adjust Steering Input as Needed to Maintain Targeted Path of Travel
Apply Light Acceleration (2 mph is goal) to Move the Weight to the Rear. (The Traction Control System will adjust the speed and brakes automatically when activated)

26. Off-Road Recovery Do not panic and steer too abruptly
Ease off accelerator
DO NOT BRAKE
Get both wheels off the pavement
Steer the vehicle parallel to the roadway
If clear, ease back on to the roadway one wheel at a time
Limit steering inputs to less than 1/8 of a turn of the wheel
Use even less input when the edge of road is high

27. Don’t forget to take Section 5 Day 5 Quiz on Quia.com
Class Work
In your driver’s education book, read pages
WRITE Lesson review 1 questions (1+2) on page 256.
Save these to be turned in with your test!
Don’t forget to take Section 5 Day 5 Quiz on Quia.com

28. THE END!