Interstate 26 eastbound in Spartanburg County has been shut down after a tractor-trailer struck a bridge Sunday afternoon.Corporal Matt Southern said the vehicle struck the SC-49 bridge over I-26 near mile marker 44.The collision happened at 4:41 p.m., Southern said.All eastbound lanes of I-26 are closed, and traffic is being detoured off at exit 44.Drivers can get back on the interstate at the top of