Driver Preferences and Usability of Adjustable Distance Controls for an Adaptive211 Cruise Control (ACC) System. Human Factors Studies for the Evaluation, Analysis 211 and Operational Assessment of an Intelligent Cruise Control System

摘要

This report describes an investigation of driver preferences and usability of211u001eadjustable distance controls for an adaptive cruise control (ACC) system. ACC is 211u001econceived as an enhancement to conventional cruise control that would accommodate 211u001ea slower moving vehicle in the lane of travel by providing some moderate level of 211u001edeceleration and distance maintenance behind the slower vehicle. While the ACC 211u001esystem is maintaining a distance behind a slower vehicle, there is the 211u001epossibility for the driver to adjust the following distance according to his/her 211u001epreferences. In this study, thirty-six participants (equal numbers of men and 211u001ewomen grouped according to ages 25-39, 40-54, and 55 and over) were Introduced to 211u001ethe concept of ACC by using a computer prototype of an ACC system.Participants 211u001ewere asked to provide their preferences for labels for two types of adjustable 211u001edistance controls: one type that adjusts both speed and distance (shared 211u001econtrols) and another that adjusts only distance (separate control).They also 211u001eused the controls to get closer and farther away from a slower vehicle in front 211u001eof them and provided their preferences for shared or separate controls for 211u001edistance adjustment. Participants preferred shared controls to a separate control 211u001efor distance adjustment. They preferred the labels ACC/DEC for shared controls