Highlights A driving simulator assessment of an in-vehicle eco-driving assistance system. Visual, visual-auditory or haptic real-time guidance on efficient accelerator pedal use given. Haptic force feedback via the accelerator pedal is the most effective haptic eco-driving interface. Visual second-order displays with audio were more effective than a simple fuel efficiency display. Results can be used to maximise fuel economy gains and driver acceptance when using these systems.
Abstract This high-fidelity driving simulator study used a paired comparison design to investigate the effectiveness of 12 potential eco-driving interfaces. Previous work has demonstrated fuel economy improvements through the provision of in-vehicle eco-driving guidance using a visual or haptic interface. This study uses an eco-driving assistance system that advises the driver of the most fuel efficient accelerator pedal angle, in real time. Assistance was provided to drivers through a visual dashboard display, a multimodal visual dashboard and auditory tone combination, or a haptic accelerator pedal. The style of advice delivery was varied within each modality. The effectiveness of the eco-driving guidance was assessed via subjective feedback, and objectively through the pedal angle error between system-requested and participant-selected accelerator pedal angle. Comparisons amongst the six haptic systems suggest that drivers are guided best by a force feedback system, where a driver experiences a step change in force applied against their foot when they accelerate inefficiently. Subjective impressions also identified this system as more effective than a stiffness feedback system involving a more gradual change in pedal feedback. For interfaces with a visual component, drivers produced smaller pedal errors with an in-vehicle visual display containing second order information on the required rate of change of pedal angle, in addition to current fuel economy information. This was supported by subjective feedback. The presence of complementary audio alerts improved eco-driving performance and reduced visual distraction from the roadway. The results of this study can inform the further development of an in-vehicle assistance system that supports ‘green’ driving.
Interface design considerations for an in-vehicle eco-driving assistance system
Tramsportation Research, Part C: Emerging Technologies ; 58 ; 642-656
2014-12-18
15 pages
Article (Journal)
Electronic Resource
English
Interface design considerations for an in-vehicle eco-driving assistance system
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