The U.S. Treasury Department alleges that the Iranian regime has increasingly relied on its railway system to transport petroleum, fertilizer, chemicals, and other goods to circumvent the U.S. naval blockade

From the articleTreasury Department sanctions Iran’s automotive and rail sectors, areas Tehran has increasingly relied on due to blockadeAlso in US sanctions target Iran's auto, rail sectors after blockade chokes shipping lanes | Reuters, Treasury targets Iranian auto, rail sectors in latest round of sanctions, Treasury sanctions operation targets Iran's auto, rail industries in latest economic attack