I recently read that CSX will be doing track through the end of March and Amtrak will be adjusting schedules - reference Trains Magazine News wire for February 22 (excerpt below).
CSX says it will have three maintenance-of-way gangs working Sundays through Wednesdays on its North End Subdivision between Richmond, Va., and Rocky Mount, N.C., on Amtrak’s “A-Line” from Sunday, Feb. 26 through Wednesday, March 29. The maintenance work will affect the schedules of those three Amtrak trains, the Silver Star, Carolinian, and Palmetto.
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Amtrak said it will adjust the schedule of train No. 92, the Silver Star from Miami to New York, originating on Saturdays through Tuesdays, March 4-7, 11-14, 18-21 and 25-28, so it will be past the work limits before the gang removes the track from service. The train will leave Miami at its current 8:50 a.m. but bypass Tampa and run about 2 hours earlier from Kissimmee north. A bus will operate from Miami through Tampa to Winter Haven, Fla., to connect with No. 92. The trains originating Wednesdays through Fridays will operate on their regular schedule from Miami to New York, making all stops.