Positive train control shared network.

PDFTech ReportRR 15-09Positive train controlComputer networksMessages (Communications)Communication systemsInteroperabilityRailroad safetyImplementationUnited StatesUnited States. Federal Railroad AdministrationUnited States. Federal Railroad AdministrationUS Transportation CollectionThe Interoperable Train Control (ITC) PositiveTrain Control (PTC) Shared Network (IPSN)project investigated anticipated industry benefitsand the level of support for the development ofa hosted technological platform for PTCmessaging across multiple railroads. A hostednetwork would reduce the number ofinterconnections between Class 1 railroads andthe short line and commuter railroads; helpminimize the required number of communicationlinks to send and receive PTC messages totenant railroads; and provide centralizedpersonnel and IT infrastructure to support therailroads in performing PTC messageinterchange with their host railroads, whichyields efficiencies in manpower and technicalPTC implementation complexit