Sioux City police said officers were called to Interstate 29 south for a person laying in the road at the Hamilton Boulevard exit at 3:26 a.m.
Police said 42-year-old Sarah Zirbel of Sioux City had been hit by a semi-tractor pulling a livestock trailer. Zirbel was critically injured and taken to Mercy Medical Center where she died.
Investigators said it appears Zirbel was standing on the roadway in the right lane of I-29 near the Hamilton Exit.
Police said the incident remains under investigation and no other information is being released at this time.
Knowing the signs of a heart attack and what to do if you experience one could be life saving.
2929 Signal Hill Drive Sioux City, IA 51108
Switchboard: 712-239-4100 or 800-234-KTIV(5848)
News: (712) 226-5480
Fax: (712) 239-3025
News Tips: email@example.com