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 Corp. is exploring an acquisition of Norfolk Southern Corp., setting up what could rank as the largest railroad deal ever, according to people familiar with the matter.The talks are at an early stage and there’s no guarantee the companies will reach a deal,

Union Pacific is reportedly considering acquiring a rival railroad, sending shares of CSX and Norfolk Southern higher.