When pulling doubles or triples, why should the driver avoid quick steering movements to recover from a tire blowout or obstacle?

AVOIDING QUICK STEERING IN DOUBLES/TRIPLES: Because of rearward amplification, sudden steering inputs are dangerous: a quick swerve (to avoid an obstacle or recover from a problem) is amplified through each trailer; the rear trailer can swing violently — potentially rolling over or striking adjacent vehicles; the 'crack-the-whip' effect means the emergency maneuver intended to avoid one hazard can create a worse one (rollover, loss of control);

Emergency response: Even in emergencies, make controlled, deliberate steering corrections rather than violent jerks; for a tire blowout, hold the wheel firmly, ease off the throttle, keep the combination straight, and brake gently once stable; STOPPING vs SWERVING: Often braking (smoothly) is safer than a hard swerve for multi-trailer combinations.

Practice/awareness: Drivers must be mentally prepared to respond smoothly rather than reflexively jerking the wheel.

Prevention: Maintain space and scan ahead so emergency maneuvers are less likely needed; the amplification effect makes the natural instinct (sharp swerve) particularly dangerous in doubles/triples; controlled, gradual inputs — even when reacting to a hazard — are essential to avoid triggering a rollover of the rear trailer.