An Ergonomic Study on Gear Position Sequence and Gear Indicator Location of Automotive Dial-Type Gearshift

In the pursuit of an ergonomic gear indicator design for dial-type gearshifts, this study conducted a survey to comparatively evaluate eight different gear indicator layout-design alternatives that were derived by combining two gear-position sequences (P-R-N-D and D-N-R-P) and four gear indicator locations (up, down, left, and right sides of the gear selector). A total of 61 respondents of various ages and driving experiences evaluated each design alternative on nine subjective measures (accuracy, efficiency, rapidity, learnability, intuitiveness, safety, preference, memorability, and satisfaction). In addition, a freehand-design session was conducted to capture the respondents’ preferred gear indicator layouts. The study revealed: (1) superiority of P-R-N-D over D-N-R-P for gear-position sequence; (2) superiority in the order of up, left, right, and down for gear indicator location; (3) the layout with P-R-N-D above the gear selector as the best combination; and (4) notable relative superiority of the layout with D-N-R-P to the left of the gear selector, despite not being a combination of superior sequence and location. Interpretations and explanations for these study findings are discussed from various perspectives, contributing insights to the ergonomic design of gear indicators for dial-type gearshifts that can prevent driver confusion/misoperation and address safety concerns associated with conventional dial-type gearshifts.