User Acceptance of HMI Solutions for Lane Departure Warning System



User Acceptance of HMI Solutions for Lane Departure Warning System

Authors

L-E LervÄg, T Moen, G Jenssen, SINTEF, NO

Description

This paper presents the results of a study regarding Human-Machine Interface (HMI) for lane keeping support systems. The study is conducted at SINTEF department of Transportation Research, on commission from the Norwegian Public Roads Administration.

Abstract

User Acceptance of HMI Solutions for Lane Departure Warning System

This paper presents the results of a study regarding Human-Machine Interface (HMI) for lane keeping support systems. The study is conducted at SINTEF department of Transportation Research, on commission from the Norwegian Public Roads Administration.

The main objective has been to test and develop HMI-concepts for driver assistance systems which alert the driver when the vehicle is crossing the lane boundaries. The project is based on a Norwegian driver assistance system named WayPilot, which uses RFID technology to detect when the vehicle leaves the current lane. The existing WayPilot HMI solution presents visual and audible warning to the driver, using a Windows Mobile based cell phone.

Based on a literature review and an expert evaluation of the existing WayPilot system, two alternative HMI designs were developed. The two alternative HMI solutions were based on haptic/tactile feedback, with vibration motors placed respectively in the driver?s seat and steering wheel.

A simulator study was conducted with focus on user acceptance for the different HMI solutions. The results show that subjects in general experience systems for lane support as useful an effective in terms of driver behaviour and traffic safety. The tested systems get low scores on willingness to pay and test drivers in the study where not very keen on buying such systems for their own car. Still, they were positive to mandatory installation of such Lane Departure Warning systems on all new cars.

User acceptance was generally highest for haptic/tactile systems. The tactile steering wheel received the highest rating of the three systems tested in this study, followed by the tactile seat. There were minor differences in the assessment scores for the haptic/tactile systems, but the standard audio/visual system had a significant lower score than the other systems regarding user acceptance.

The study also showed that subject with less sensation seeking tendency, had more faith and were generally more positive to the Lane Departure Warning system than subjects with high sensation seeking qualities.

Finally, the following recommendation regarding choice of HMI concept is based on survey results, complexity and technical implementation, and willingness to pay:
- For factory installed systems, the tactile steering wheel solution is recommended
- For aftermarket, the tactile seat solution is preferential
- A complete ready to use system should not cost more than ? 600.

Publisher

Association for European Transport