. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . 1^. SIGNAL SHOWIN-G TRIP UPRAISED NKAR OUTSIDE OP RAIL. The operation of the speed-control ortime-governed mechanism of these sen-tinel signals is dependent upon the pres-ence of a standing train at the stationplatform, or on the cross-over, and whenthe station track is empty, and the cross-overs free, the speed control does not op-erate. In this way the presence or ab-sence of a train in the station track oron the cross-overs is the determining fac-tor in the problem. The presence ofsuch a t
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . 1^. SIGNAL SHOWIN-G TRIP UPRAISED NKAR OUTSIDE OP RAIL. The operation of the speed-control ortime-governed mechanism of these sen-tinel signals is dependent upon the pres-ence of a standing train at the stationplatform, or on the cross-over, and whenthe station track is empty, and the cross-overs free, the speed control does not op-erate. In this way the presence or ab-sence of a train in the station track oron the cross-overs is the determining fac-tor in the problem. The presence ofsuch a train calls into play the protect-ive mechanism, and the absence of such;i train, by removing the necessity forstation or cross-over track protection, au-tcmatically governs the sentinel sig-nals and they indicate the line clear. Thelimiting point in the station express track system has increased the capacity of thestation tracks at Ninety-sixth street abovethat of the road above and below thatpoint. In other words it is possible to-pass trains through the Ninety-sixth sta-tion faster than they can be
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