Jackknifes

Jackknifes.jpg

Due to winter roadways, there is an increased risk of jackknifes, but this type of loss of control crash can occur any time of the year. To avoid a jackknife - or to recover from one, drivers must be able to recognize the hazards that contribute to a jackknife. They must also know how to defend against it. Read the information below, and ask yourself if there are actions you can take to improve your driving skills and reduce the risk of a crash.

Recognize the Hazards

Environment

  • Adverse road conditions

    • Black ice, snow, sand, salt, etc.
  • Adverse weather 
    • Poor visibility, high winds, rain, etc.

Equipment

  • Loss of rolling traction
    • Tractor: drive wheels slide or spin and try to lead the steer tires

    • Tractor: steer tires lock up

    • Trailer: tandems slide or spin and try to lead the tractor

  • Insufficient tire tread depth
  • Brake failure or improper adjustment
  • Disconnected air hose
  • Cargo shift
  • Lightly-loaded or empty trailers

Personal behaviors

  • Driving too fast for conditions
  • Inattention/distractions
  • Using the engine brake or cruise control on slippery surfaces
  • Braking abruptly
  • Sharp turn of the steering wheel
  • Sudden acceleration
  • Inexperience
  • Driving in adverse conditions

Know the Defense

Essential 7 Driving Techniques

  • React properly to hazards
    • Do not use the engine brake or cruise control in slippery road conditions
    • Find a safe place to park if driving conditions are too hazardous
    • Use the inter-axle differential lock, if necessary, according to manufacturer's specifications
  • Avoid distractions
    • Get plenty of rest to avoid fatigue
    • Put away mobile devices and other distractions inside the cab
  • Be attentive to the road ahead
    • Watch for slowing or stopping traffic
  • Maintain proper following distance
    • Leave yourself extra stopping distance
  • Observe proper speed for conditions
    • Slow down in slippery road conditions

Recovering from a jackknife

  • Disengage the clutch (manual) or shift to neutral (automatic) to regain rolling traction
  • Avoid using the brakes
  • Steer in the direction of the skid, then counter-steer, as needed, to straighten the truck

Note: these lists are not intended to be all-inclusive.

The information in this article is provided as a courtesy of Great West Casualty Company and is part of the Value-Driven® Company program. Value-Driven Company was created to help educate and inform insureds so they can make better decisions, build a culture that values safety, and manage risk more effectively. To see what additional resources Great West Casualty Company can provide for its insureds, please contact your safety representative, or click below to find an agent.

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© Great West Casualty Company 2018. The material in this publication is the property of Great West Casualty Company unless otherwise noted and may not be reproduced without its written consent by any person other than a current insured of Great West Casualty Company for business purposes. Insured should attribute use as follows: “© Great West Casualty Company 2018. Used with permission by Great West Casualty Company.”

This material is intended to be a broad overview of the subject matter and is provided for informational purposes only. Great West Casualty Company does not provide legal advice to its insureds, nor does it advise insureds on employment-related issues. Therefore, the subject matter is not intended to serve as legal or employment advice for any issue(s) that may arise in the operations of its insureds. Legal advice should always be sought from the insured’s legal counsel. Great West Casualty Company shall have neither liability nor responsibility to any person or entity with respect to any loss, action, or inaction alleged to be caused directly or indirectly as a result of the information contained herein.

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