signal for blocking the track

Jointless coded track circuits for railroad signal systems
TRACK-LOCOMOTIVE TRANSMISSION THROUGH THE RAIL
Investigation: RO 2014-021 - Incident Involving Absolute Signal Blocking at Warnervale, NSW on 24 November 2014
Efficient parallel algorithm for statistical ion track simulations in crystalline materials
DESIGNING ADMISSION CONTROL POLICIES TO MINIMIZE BLOCKING/FORCED-TERMINATION IN MULTIMEDIA CELLULAR NETWORKS
Study of Modulation Signal’s Parameters in Resonance Type Jointless Shifting Frequency Track Circuit
THE A.T.C. (AUTOMATIC TRAIN CONTROL) AND A.P.B. (ABSOLUTE PERMISSIVE BLOCKING) SYSTEMS IN AUTOMATIC TRAIN RUNNING
Toy vehicle racetrack with paired obstacles
Signal System for Tulkimachi-Angren Railway of Uzbekistan
Lagrange/Vandermonde MUI eliminating user codes for quasi-synchronous CDMA in unknown multipath