There are many diverse factors why you’ll find accidents involving huge trucks include things like negligence on the part on the truck driver or even the other cars needed.
Others include things like:
Aggressive drivers
Unrealistic schedules
Failure to inspect tires, brakes and lights
Tailgating
Long work-shifts
Driver fatigue
Cell phone use
Failure to install blind spot mirrors
Jackknifing
Speeding and ignoring reduced truck speed limit
A [...]