Union Pacific and Norfolk Southern are in merger talks to create the largest railroad in North America that would connect the East and West Coasts.

Union Pacific , the largest U.S. freight railroad operator, is exploring a possible acquisition of Norfolk Southern to create a $200 billion coast-to-coast rail network, a person familiar with the matter said.

ATLANTA, GA — Union Pacific is exploring an acquisition of Atlanta-based Norfolk Southern. This could be the largest railroad deal ever merging the No. 1 and No. 5 North American railroads by revenue with a combined market value of almost $200B.