F-Line to Dudley
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It's I-ETMS because CSX wants to run 60 MPH freights to Maine, which you can't physically do on ACSES because of its inability to detect train lengths. Expect a MassDOT announcement in the coming months that they'll be co-installing I-ETMS on the Haverhill and Fitchburg Line CSX overlaps as well, because they badly want that 60 MPH to be inclusive of MBTA territory too. The I-ETMS on the Downeaster route wouldn't preclude a future MBTA extension to Plaistow (or even Dover) because CSX has to traverse cab signal territory on the Fitchburg and Haverhill overlaps to get there at all, so a cab signal + ACSES co-install past the border wouldn't inconvenience them one bit more than they're already inconvenienced on those runs. It's a bigger deal for them to get rid of cabs on the western B&A because of all the West Springfield, East Brookfield, and Worcester traffic--a significant majority of their overall New England train schedules and carloads--that would get out from under having to have specialty signal-equipped power at all.Actually, that reminds me. I believe that Downeaster service had been capped at 6RT trips, due to the limits of FRA PTC waivers which went away when CSX bought Pan Am. I know that any additional service is beholden to the current lack of equipment availability, but I believe they opted for I-ETMS, despite connecting to the ACSES Haverhill Line, probably thanks to centralized CSX dispatch. Also, the press release seems to indicate that Amtrak is funding all of the signal work. Any clue on how Amtrak ended up with the bill when its an FRA mandate for all Class Is?
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Amtrak and CSX Partner on Positive Train Control Installation to Improve Safety for the Amtrak Downeaster - Amtrak Media
Tech added to over 100 miles of track between Haverhill, Mass. and Brunswick, Maine FREEPORT, MAINE – Amtrak and CSX, in partnership with the Northern Newmedia.amtrak.com
Amtrak is throwing in the $50M not for the PTC, but for the general signal renewal on the Downeaster. Most of the route from the MA state line north (excepting Yarmouth-Brunswick, ME which was all-new for the Brunswick extension) is truly ancient B&M-era signal plant that Pan Am didn't maintain for shit for 40 years and only put on a band-aiding show at its most oft-failing spots when the Downeaster began service 24 years ago. Signal reliability is the #1 terror threat to the Downeaster's daily schedule adherence the system is getting so frail, so for there to be any expansion of schedules like NNEPRA plans there has to be a belated state-of-repair blitz to the signals. CSX is already replacing all the signal heads (most of which were B&M semi-mechanical searchlights that are safety-grandfathered by the FRA and not up-to-code) with LED's and higher-visibility overhead gantries, but most of the cable plant between signal heads is still the same old shit and needs to go pronto before it tanks everybody's OTP. That's what Amtrak is funding.