What causes a truck to jackknife and who is at fault in Georgia?

· 3 min read

A jackknife happens when a tractor-trailer’s trailer swings out of line with the cab, folding toward it like a closing pocketknife. It usually traces back to a loss of traction during braking or a skid, and in Georgia the fault analysis focuses on whether the driver or carrier could have prevented the conditions that let it occur.

Common causes of a jackknife

Jackknifing is generally a controllable event, not bad luck. Frequent contributing factors include:

  • Hard or improper braking that locks the trailer or drive wheels and breaks traction.
  • Driving too fast for wet, icy, or slick road conditions.
  • Worn or poorly maintained brakes that grab unevenly between the tractor and trailer.
  • Bald or underinflated tires that lose grip.
  • An empty or lightly loaded trailer, which has less traction and is more prone to swing.
  • Abrupt steering or downshifting that upsets the rig’s balance.

Most of these point to driver decisions or equipment maintenance, both of which are within a carrier’s and driver’s control.

How Georgia assigns fault

Georgia uses ordinary negligence principles, asking whether the driver and carrier used reasonable care under the conditions. A driver who brakes too hard for the road surface, speeds in poor weather, or operates a rig with neglected brakes can be found negligent when those choices trigger the jackknife. The carrier can face responsibility both for the driver’s conduct, under the employer-liability rule, and for its own failures, such as inadequate maintenance or dispatching the truck in unsafe condition.

Federal motor carrier rules require that commercial vehicles be regularly inspected, repaired, and maintained, and that brakes meet safety standards. A jackknife linked to defective or poorly maintained brakes can therefore reflect a violation that supports a negligence finding.

When fault may be shared or shifted

Not every jackknife is the truck driver’s fault. If another motorist cut off the truck, brake-checked it, or forced a sudden evasive stop, that driver may bear part or all of the responsibility. Georgia sorts each party’s contribution into a percentage, and an injured person who turns out to be at least half to blame walks away with nothing. Sorting this out usually relies on the police report, skid and yaw marks, the truck’s brake and maintenance records, weather data, and any electronic or camera evidence.

The bottom line

A truck jackknifes mainly because of improper braking, excessive speed for conditions, or poor brake and tire maintenance, most of which a careful driver and carrier can prevent. In Georgia, fault generally falls on the driver or carrier whose conduct or neglect caused the skid, though another motorist’s actions can pull part of that blame away once the jury sets each side’s percentage.

This article is for general educational and informational purposes only and is not legal advice. It does not create an attorney-client relationship, and Georgia law may change. For advice about a specific situation, consult a licensed Georgia personal injury attorney.

Related:

  1. Who is liable when a peach-harvest farm truck causes a crash on a rural Georgia highway? A crash caused by a farm truck during harvest season usually involves more than the person behind the wheel. Responsibility can reach the driver, the farm or business that owns......
  2. Who is at fault when a driver making a U-turn causes a Georgia crash? The driver executing the U-turn usually bears the fault, because Georgia law places strict conditions on when and where such a turn is allowed and requires it to be completed......
  3. What is a rear underride crash and is a missing guard the truck’s fault? A rear underride crash occurs when a passenger vehicle strikes the back of a tractor-trailer and slides underneath it, often because a car's hood sits lower than a trailer's rear.......
  4. Can a truck driver be at fault for a crash in the no-zone blind spot? Large trucks have wide blind spots, often called "no-zones," around the front, both sides, and the rear where the driver cannot see nearby vehicles. A crash in one of these......
  5. Can a truck be liable for a side underride collision in Georgia? A side underride collision happens when a vehicle strikes the side of a long trailer and slides beneath it, often where the gap between the trailer body and the road......
  6. What is negligent supervision of a commercial truck driver under Georgia law? Negligent supervision describes a carrier's failure to monitor and manage a driver it has already hired, in a way that allows preventable danger to develop on the road. Where negligent......
  7. Does a driver lacking a valid CDL strengthen my Georgia truck accident claim? A driver operating a commercial truck without a valid commercial driver's license can meaningfully strengthen an injury claim. The missing or improper license is not just a technicality; it points......
  8. Can I sue a Georgia carrier for negligently hiring an unsafe truck driver? A trucking company can be held responsible not only for what its driver did on the road but for putting an unfit driver behind the wheel in the first place.......
  9. Did Georgia change the law that let you name the truck insurer as a defendant? Yes. Georgia revised its long-standing direct-action rule in 2024, replacing broad access with a narrow one. The practical result is that, for most newer crashes, an injured person can no......
  10. Can I sue a trucking company’s insurance company directly in a Georgia truck accident case? Georgia once stood out for letting an injured person name a motor carrier's insurer as a defendant in the same lawsuit as the carrier and driver. That ability still exists,......
  11. When is the shipper or loader liable for a Georgia truck cargo accident? Responsibility for a cargo-related crash does not always stop with the driver and carrier. A shipper or the party that loaded the freight can share liability when its own conduct......
  12. How do I prove driver fatigue caused my commercial truck collision in Georgia? Fatigue leaves no skid mark, so proving it usually means assembling circumstantial evidence into a coherent picture: a driver who had been working too long, records that show it, and......
  13. Who is responsible when logs fall off a logging truck on a South Georgia road? When logs come loose from a timber truck, responsibility usually centers on whoever was charged with loading and securing the cargo, and it can extend to the trucking company and......
  14. Are Georgia parents liable when their teen causes a car accident? Parents can be on the hook when their teenager causes a crash, though not automatically. Georgia reaches parents through specific doctrines that connect them to the teen's driving, most often......
  15. Who is liable if loose livestock on a Georgia road causes my injury? When a cow, horse, or other farm animal wanders onto a Georgia roadway and causes a crash or injury, liability usually rests on the animal's owner, but only if the......

Leave a Reply