Your Success is our Business at Hirschbach Motor Lines in South Sioux City, Nebraska. Where do you look for success as a Professional Driver? Hirschbach Motor Lines. We have options for Professional Drivers in our Company Driver fleet, as a Lease Purchase Operator, or an Owner Operator. We run excellent freight lanes primarily east of the Rocky Mountains. Our trucks are among the newest in the industry with the majority of our fleet made up of 2013, 2014, 2015 & 2016 International ProStar+ tractors.