My understanding is that NS requires two. There are grades both ways in North Carolina and Alabama. 19 and 20 have always run with two. The consist that has been running for the past 3 or 4 months is only about one car less than before the pandemic.I was surprised to see that even with the current somewhat reduced consist the Crescent is running with two locomotives. Is there a significant grade along the route that requires this? Is it the sleeper(s) need for additional HEP?
The Texas Eagle and the City of New Orleans regularly run with only 1 P-42.Running with one engine on a full consist slows the train from getting up to speed. Running with two engines also insures a fail-safe mode. The only LD route that I saw running with one engine is the Cardinal but that has a smaller consist and often runs only one sleeper.
The change was at least 20 years ago. I imagine they stopped doing that account of the expense and time of switching and there really wasn't a benefit. Part of that time they were hauling express cars WAS-ATL and they dropped those off also.Thanks JT51. I wonder what changed.