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Johnson County, IA (Press-Citizen) -- A cautionary look from the Johnson County Sheriff's Department on why motorists should use caution when driving by vehicles parked on highway shoulders.

From Johnson County Sheriff Lonny Pulkrabek: "This video is from the crash last week where Trooper Jess Hernandez's vehicle was struck while parked on the shoulder of Interstate 80. This is just a glaring example of how close we came to losing Trooper Hernandez, Deputy Hammes, along with Reserve Deputy Pearson. All because a driver of a semi chose not to slow down when approaching a crash scene full of vehicles and emergency lights."

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