HEAVY VEHICLE DRIVER WORKLOAD ASSESSMENT. TASK 5: WORKLOAD ASSESSMENT PROTOCOL

This report presents a description of a prescriptive workload assessment protocol for use in evaluating in-cab devices in heavy vehicles. The primary objective of this heavy vehicle driver workload assessment protocol is to identify the components and processes necessary to conduct an empirical appraisal of the potential of an in-cab device to distract drivers from the driving task. The methodological approaches and experimental design strategies that may be used to conduct a workload assessment are presented in detail. Included in this protocol are sets of workload measurements that can demonstrate to what extent in-cab devices intrude onto the primary driving task. The scientific and theoretical bases for how these various workload measures relate to safe vehicle operation are discussed. The sets of workload measures comprise visual allocation measures; driver steering, pedal, and manual activity measures; driver-vehicle performance measures; and driver subjective assessments.

[1]  J. S. Hunter,et al.  Statistics for Experimenters: An Introduction to Design, Data Analysis, and Model Building. , 1979 .

[2]  David Meister.  Human Factors Testing and Evaluation , 1986 .

[3]  Leonard Evans,et al.  Traffic Safety and the Driver , 1991 .

[4]  B. J. Winer,et al.  Statistical Principles in Experimental Design, 2nd Edition. , 1973 .

[5]  E D Sussman,et al.  Driver inattention and highway safety , 1985 .

[6]  Sidney L. Smith,et al.  Guidelines for Designing User Interface Software , 1986 .

[7]  A Smiley,et al.  OVERVIEW AND METHODOLOGIES OF THE ITS SAFETY EVALUATION PROCESS , 1996 .

[8]  J R Treat,et al.  TRI-LEVEL STUDY OF THE CAUSES OF TRAFFIC ACCIDENTS. EXECUTIVE SUMMARY , 1979 .

[9]  Nicholas J Garber,et al.  FACTORS AFFECTING SPEED VARIANCE AND ITS INFLUENCE ON ACCIDENTS , 1989 .

[10]  T A Dingus,et al.  MOVING FROM MEASURES OF PERFORMANCE TO MEASURES OF EFFECTIVENESS IN THE SAFETY EVALUATION OF ITS PRODUCTS OR DEMONSTRATIONS , 1995 .

[11]  I. Brown,et al.  Vision in Vehicles III , 1991 .

[12]  J A Cirillo,et al.  INTERSTATE SYSTEM ACCIDENT RESEARCH STUDY II, INTERIM REPORT II , 1968 .

[13]  J. Godthelp.  Studies on human vehicle control , 1984 .

[14]  Gavriel Salvendy,et al.  Handbook of human factors. , 1987 .

[15]  Melissa J. Williams,et al.  Validity of the traffic conflicts technique , 1981 .

[16]  S. John Older,et al.  Traffic Conflicts—A Development in Accident Research , 1976 .

[17]  David Meister,et al.  Behavioral Analysis and Measurement Methods , 1985 .

[18]  R. Kirk.  Experimental Design: Procedures for the Behavioral Sciences , 1970 .

[19]  August L Burgett.  Methodologies for evaluating the impact on safety of intelligent vehicle highway systems , 1995 .

[20]  A Chapanis.  Relevance of physiological and psychological criteria to man-machine systems: the present state of the art. , 1970, Ergonomics.

[21]  L Tijerina,et al.  A SYNOPSIS OF THE ITS AMERICA/NHTSA WORKSHOP ON ITS SAFETY EVALUATIONS , 1995 .

[22]  S. Barton,et al.  Chaos, self-organization, and psychology. , 1994, The American psychologist.

[23]  Louis Tijerina,et al.  AN ANALYSIS OF DRIVING ACCIDENT NARRATIVES AS A MEANS OF DETERMINING PROBLEMS CAUSED BY IN-VEHICLE VISUAL ALLOCATION AND VISUAL WORKLOAD , 1996 .