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vital lifelines to the nation. but now a harsh new reality is setting in for many long haulers. here is shannon pettypiece. >> reporter: the days start early for arnisha baron. >> sometimes i have to spray a little. i do this every day. >> reporter: up before 4:30 a.m., readying her 18-wheeler. today she's hauling dairy to chicago, picking up in virginia's shenandoah valley. that's where i joined her. wow! roomy in here. >> my refrigerator is right here. >> reporter: and a little microwave. >> yep, and my tv. >> reporter: how many hours will you drive in a normal week? >> 70 hours. >> reporter: baron is a single mother of three. trucking paid the bills. >> my ultimate goal was not to fail my kids. i'm driving, they call me, doing homework. i'm doing the mom duties while in the