The Zacks Transportation - Rail industry is benefiting from significantly improved volumes, thanks to an uptick in economic activities. However, weakness in volumes in certain commodity groups is a near-term challenge for the industry. High fuel expenses due to rising fuel prices further dull the prospects of the railroad industry.Despite adversities, companies like Union Pacific Corporation UNP, CSX Corporation CSX and Norfolk Southern Corporation NSC are expected to gain on expectations of continued improvement in volumes as the economy gathers momentum. 5 Stocks Set to Double Each was handpicked by a Zacks expert as the #1 favorite stock to gain +100% or more in 2021. Previous recommendations have soared +143.0%, +175.9%, +498.3% and +673.0%. Most of the stocks in this report are flying under Wall Street radar, which provides a great opportunity to get in on the ground floor.Today, See These 5 Potential Home Runs >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Union Pacific Corporation (UNP): Free Stock Analysis Report CSX Corporation (CSX): Free Stock Analysis Report Norfolk Southern Corporation (NSC): Free Stock Analysis Report Kansas City Southern (KSU): Free Stock Analysis Report To read this article on Zacks.com click here.