When I was living east of Davison from 2009 until 2015, the elba hotbox detector was only 2 miles from me on the CN. Those CSX guys were always telling the CN dispatcher how happy they were to be on 60 mile per hour trackage, and the detector proved it, as sometimes they would push it by the detector at 62 or 63,...imagine those boys was elated to be going somewhere at more than a snails' pace!