In between Tunnel 3 and Tunnel 4, the westbound Zephyr is creeping along at restricted speed. Right around 10 MPH (16 KPH). The train received a restricting signal at the west end of Plain and will continue at this speed until (at least) the east portal of Tunnel 10, the location of the next signal. The head end of AMTK 159 is just about to duck into Tunnel 4.
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