Jersey Shore Personal Injury and Employment Specialists

The dangers of jackknifing trucks

On Behalf of | Dec 30, 2025 | Truck Accidents |

Big trucks are a common sight on New Jersey highways. Most days, they move safely. But sometimes, a truck can “jackknife.” This is a very dangerous type of crash.

A jackknife happens when the truck’s trailer swings out to the side. The truck and trailer fold in like a pocketknife. When this happens, the driver loses control. The trailer can slide across the road and hit many cars at once.

What causes trucks to jackknife?

Jackknife crashes often happen when the truck stops too fast. Wet roads, ice, snow or sharp turns can make the trailer slide. Speeding makes it worse. If a driver is tired, distracted or just not paying attention, they may brake too late and cause a jackknife.

Poor truck maintenance can also lead to a crash. Worn brakes, bad tires and loose cargo can make the trailer unstable. If the load shifts, the trailer can swing out and cause a skid.

Aftermath of a jackknife accident

These crashes can cause very serious injuries. Cars are much smaller than trucks. People in cars can suffer broken bones, head injuries, back injuries or not survive the wreck at all. Many jackknife crashes involve several cars, which makes the damage even greater.

Figuring out who is at fault can be hard. The truck driver may be responsible. But sometimes the trucking company, a repair shop or even the people who loaded the truck, e.g., “lumpers,” may share blame. 

If you get injured in a truck jackknife accident, it is important to get medical attention promptly. Learning more about your rights and responsibilities is a good idea when filing a claim for damages.