“…From the point of view of signalling and control, interest (at least as reflected in published work) was probably less in the 1960s to 1980s than it was for driving, but there have been a number of different contributions since (Carey, 1992;Collis and Schmid, 2001;Cordiner et al, 2001;de Waard, 1996;Fay and Schnieder, 1998;Lenior, 1993;Luff and Heath, 2001;McDonald, 2001;Nichols et al, 2001;Olsson et al, 1996;Reid et al, 2000;Vanderhaegen and Telle, 1998;Wilson et al, 2001). A good deal of this research has dealt with the mental workload of signallers, most recently by Pickup and colleagues (e.g.…”