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Virtual Block Track Circuit Assessment

Document Series
Research Results
Federal Railroad Administration
Report Number
RR 22-34
Subject Train Control
Virtual Block Track Circuit, VBTC, Positive Train Control, PTC, Quasi-Moving Block, QMB, virtual block, VB, ConOps, direct current

To research the Virtual Block Track Circuit (VBTC) concept and evaluate the performance of a supplier’s prototype, the Federal Railroad Administration (FRA) sponsored Transportation Technology Center, Inc. from 2021 through August 2022 to perform a capacity analysis related to potential efficiency improvements that can be achieved by implementing VBTC where Positive Train Control (PTC) is in operation. The research and testing within this project demonstrated that the expectation of the VBTC system is to be able to reduce train headway and improve line-of-road capacity without modifications to the PTC architecture.

Last updated: Monday, October 24, 2022