Tips for Preventing Jackknifing

Recognize the causes of jackknifing. Jackknifing happens when the towing vehicle loses traction and begins to skid, with the trailing trailer exerting force that can result in a spin. Being aware of this risk is key to preventing accidents.

Distinguish between Jackknifing and Trailer Slew

Be cautious with light loads. Heavy loads reduce the risk of jackknifing. Empty trailers or poorly distributed loads lack traction, causing potential skidding when brakes are applied. Utilize caution with brake application to prevent wheel lock-up and subsequent skidding.

Employ gradual braking and maintain safe distances. Spread braking actions over extended distances, decreasing speed progressively. Maintain safe distances from other vehicles and anticipate road conditions, particularly on slippery surfaces or downhill stretches.

Minimize braking during curves. Initiate braking on straightaways before entering curves, decreasing speed slightly below necessary levels. Release brakes prior to turning and apply gentle acceleration during the turn to maintain traction. Approach downhill turns cautiously, ensuring trailer momentum is controlled before initiating the turn.

During emergency maneuvers, avoid simultaneous braking and swerving. Prioritize braking to reduce speed, then swerve after releasing brakes for better vehicle control. Reapply brakes as needed post-swerve.

Exercise caution with engine brakes or retarders on slippery surfaces. Using these on slick roads may lock the drive axle, potentially leading to jackknifing. If necessary, slow down with gentle braking before cautiously engaging the retarder or selecting a lower gear for descent.

Prevent jackknifing by avoiding skidding. If your vehicle begins to skid, immediately release the brake and correct the skid to prevent further complications, as uncorrected skids can lead to jackknifing when the trailer pushes from behind.

Maintain both tractor and trailer adequately. Ensure even brakes, proper tire conditions, and functioning suspension components to mitigate the risk of losing control.

Utilize modern anti-lock braking systems for improved safety. Originally designed for aircraft, these systems are now equipped in heavy vehicles to detect tire skidding and adjust braking force automatically, preventing wheel lockup.

1. While shiny roads generally indicate higher slipperiness, certain conditions pose particular danger:
   • Light snow covering or icy roads disguised by a thin layer of snow.
   • Beware of black ice in cold weather, which is invisible but extremely hazardous.
   • Rain after dry spells creates slippery conditions akin to soapy water when mixed with road dust.
   • Wet roads covered with fallen leaves increase skid risk, potentially leading to jackknifing.
2. Trailers lacking independent brakes are highly susceptible to jackknifing, especially when heavily loaded. Exercise extra caution when towing such trailers on slippery surfaces.