 The coating is applied from special trains (colloquially referred to as "Sandite trains" after the original proprietary mixture applied) and in some cases locally by hand applicators.Lineside-fitted Traction gel applicators which apply liquid to the railhead as a train passes are fitted at sites where significant low adhesion regularly occurs, such as on the approach to stations.Both of these processes are effective for a limited duration; the jetting method is ineffective as soon as the next leaf falls; the sand deposition method is more durable, although rainfall usually removes the deposited sand quickly.