(Urbandale, IA) -- A lot of drivers on I-80/35 early this morning are replacing the tires. Urbandale Police say a truck driver hauling lumber lost part of the load around 5:45. It happened in the westbound lanes, between Merle Hay Road and 86th Street. Urbandale Police Officer Holly Pickett says say about 10-vehicles behind the truck got flat tires, and had to be towed away. There were no injuries.