To avoid tying up valuable track space by having to switch  locomotives from the head of a newly arrived train, the railroads  devised an efficient solution called the “flying switch.” An inbound  train speeded up, a brakeman uncoupled the engine from its cars, the  locomotive accelerated further and was switched onto a siding, while the  passenger cars coasted into the station with brakemen controlling their  speed by hand brakes, bringing the cars to a gentle stop.  This  procedure was used without mishap for decades.  It is a tribute to the  opposites of freedom and order working beautifully together, because the  rigid and orderly rules governing this method made for the freedom of  trains moving swiftly, reliably, and safely.