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Applying the IPDE Process

Applying the IPDE Process. Identify Open and closed zone Line of sight restrictions Other users Traffic signs and signals Roadway Features and Conditions Predict Actions of Others Speed Direction Control Decide Change/Maintain Speed Change/Maintain Steering Communicate with Others

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Applying the IPDE Process

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  1. Applying the IPDE Process Identify Open and closed zone Line of sight restrictions Other users Traffic signs and signals Roadway Features and Conditions Predict Actions of Others Speed Direction Control Decide Change/Maintain Speed Change/Maintain Steering Communicate with Others Combine Actions Execute Use smooth, deliberate actions to carry out your plan.

  2. Lane Choice Safer to drive on right and pass on left. Safest lane? Depends on situation but usually still the right lane Approaching entrances – move to center to avoid conflicts Avoid passing on the right whenever possible Reversible lanes HOT/HOV Lanes Speed limit and Common Speed

  3. Changing Lanes Avoid making lane changes too often. Avoid changing multiple lanes at one time. Avoid changing lanes when others are changing too.

  4. Passing and Being Passed Pass on the left…it’s safer!! If being passed: Change lane position if necessary to increase space To let them pass quickly reduce your speed slightly

  5. Exiting Controlled-Access Highways Locate the proper exit: Deceleration Lane Exit Ramp Advisory Speed Limit Identify type of ramp Do Not Slow Down on the Expressway Itself!!!!

  6. 3 Common Exiting Problems Ramp Overflow Crossing Paths Short Deceleration Lane

  7. Highway Problems and Features Drivers Highway Hypnosis Velocitation Disabled Vehicles Use hazard lights Raise hood Tie white cloth to antenna Stand near the back of the car away from the road

  8. Expressway Wolf-packs Vehicles bunching together on an expressway. Avoid to keep space cushion and reduce risk Change speed to avoid packs Become a “loner” and drive in between packs is possible

  9. Roadways and Toll Plazas Beltway Spur Manual Lane Automatic Lane IPASS Lane

  10. Be able to explain the safe driving strategies for expressway driving. • Know the situations that require you to increase your following distance. • Be able to explain why there are fewer collisions on expressways. • Explain what you should do if you encounter a “wolf pack.” • List and explain the common exiting problems. • Define highway hypnosis. • Define velocitation. For Your Quiz

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