Fundamentals of adhesion

Everyone has heard the expression ‘leaves on the line’ perhaps thinking it was just an excuse for late running trains. It's actually a real problem, with trains often unable to brake or accelerate normally.NewRail studied low-adhesion leaf films on track and in the laboratory and collaborated with AEAT Rail on a study for RSSB in 2005 and has tested chemical treatments to prevent leaf-film formation and to facilitate removal.