all of the hotbox and dragging equipment detectors at 62.8 80.2 and 116.00 163.4 and 176.6 mp all give the axle count and trains speed and all are on a frequency of 161.280 mhz AAR 78-78 this is awsome that you got to be on the headend as well congrats and I love trains as much as who ever posted the video's