title: Impact of automation: Measurement of performance, workload and behaviour in a complex control environment.
abstract: This paper describes an experiment that was undertaken to compare three levels of automation in rail signalling; a high level in which an automated agent set routes for trains using timetable information, a medium level in which trains were routed along pre-defined paths, and a low level where the operator (signaller) was responsible for the movement of all trains. These levels are described in terms of a Rail Automation Model based on previous automation theory (Parasuraman et al., 2000). Performance, subjective workload, and signaller activity were measured for each level of automation running under both normal operating conditions and abnormal, or disrupted, conditions. The results indicate that perceived workload, during both normal and disrupted phases of the experiment, decreased as the level of automation increased and performance was most consistent (i.e. showed the least variation between participants) with the highest level of automation. The results give a strong case in favour of automation, particularly in terms of demonstrating the potential for automation to reduce workload, but also suggest much benefit can achieved from a mid-level of automation potentially at a lower cost and complexity.
authors.affiliation: Centre for Innovative Human Systems, Trinity College Dublin, Ireland. Electronic address: balfen@tcd.ie.
authors.forename: Nora
authors.initials: N
authors.lastname: Balfe
authors.affiliation: Human Factors Research Group, School of Mechanical, Materials and Manufacturing Engineering, University of Nottingham, Nottingham, UK.
authors.forename: Sarah
authors.initials: S
authors.lastname: Sharples
authors.affiliation: Human Factors Research Group, School of Mechanical, Materials and Manufacturing Engineering, University of Nottingham, Nottingham, UK; Ergonomics Team, Network Rail, London, UK.
authors.forename: John R
authors.initials: JR
authors.lastname: Wilson
mesh_terms: D001331:Automation; D001519:Behavior; D003198:Computer Simulation; D006801:Humans; D008297:Male; D010465:Perception; D011890:Railroads; D013647:Task Performance and Analysis; D016526:Workload / Q000523:psychology*
keywords: Automation; Performance; Rail human factors; Workload