Union Pacific is in talks to buy Norfolk Southern, potentially creating a $200 billion mega-railroad that would be the largest US freight rail merger. The deal would unite coast-to-coast rail operations for the first time and significantly alter the US railroad landscape. A previous merger between Canadian Pacific and Kansas City Southern valued at $31 billion is dwarfed by this potential transaction. Any proposed deal between UP and NS faces several hurdles, including differing freight portfolios.
Source: https://www.joc.com/article/potential-up-ns-tie-up-would-cause-major-shift-in-us-intermodal-market-6046025