Union Pacific "Big Boy" now has PTC, can run on its own

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BlackDiamond

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PTC on a steam locomotive - talk about a mixture of technologies.

Union Pacific No. 4014 can now run on its own

CHEYENNE, Wyo. — This week the Union Pacific made a short run with 4-8-8-4 No. 4014 to test the new PTC system installed on the locomotive. While Big Boy has operated with a LeaPTC system since 2021, says a UP statement, the new equipment permits operation without support of a diesel locomotive.
 
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