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Northeast Corridor - New York to New Haven

This route covers the stretch of the Northeast Corridor from New York City to New Haven, Connecticut. It includes both Metro-North's New Haven Line out of Grand Central Terminal and Amtrak's main line out of Penn Station, which converge together at New Rochelle, New York.

Signaling

Dovetail developed two separate signal scripts for the Metro-North portion of the line (from Grand Central to New Haven via New Rochelle) and the Amtrak portion (from Penn Station to New Rochelle), a curious decision given that both railroads share the same Pennsylvania Railroad-derived pulse code signaling system in real life.

Penn Station to New Rochelle

The signals on the Amtrak portion of the route send messages in the form of sigN, where N is a numeric code that communicates the aspect. The codes seem to be the same codes used by the Philadelphia to New York, North Jersey Coast Line, and Morristown-Essex Line renditions of the Northeast Corridor.

Grand Central to New Haven

The signals on the Metro-North portion of the route send messages in the form of Mcc, MccRcc, or Ncc, where cc is a numeric code that communicates the aspect. The following codes are used:

Code Aspect Speed
10 Clear MAS
11 Approach Limited 45
12 Approach Medium 30
13-14 Restricting 15
15 Stop 0

The different meanings of the M.., M..R.., and N.. message types are unclear. It seems that most of the time, you will get M.. messages, unless you encounter a downgrade, in which case you'll get a M..R.. message, or an upgrade back to Clear, in which case you'll get a N.. message.

Power changes

To simulate power changeovers, Dovetail marked the end points of the route's third rail and overhead catenary systems with special signals. These emit the following messages:

Message Meaning
P-OverheadStart Overhead catenary start
P-OverheadEnd Overhead catenary end
P-ThirdRailStart Third rail start
P-ThirdRailEnd Third rail end
P-AIOverheadToThirdNow AI overhead to third rail switch
P-AIThirdToOverheadNow AI third rail to overhead switch

Speed limits

Type 1 speed limits represent visible speed posts. Type 3 limits represent signal speeds. There are no type 2 limits.