There is a close relationship between car accidents and the physiological and psychological states of drivers. Stress may lead to a feeling of fatigue or a decrease in attentiveness. Therefore, it is an important subject from viewpoints such as that of accident prevention to evaluate the mental state of drivers behind the wheel. This research aims at the development of technology that will take quantitative measurements of stress based on facial skin temperature. It is based on the relation between facial skin temperature and changes in mental state. Presumption of stress level of a driver was attempted from the change in temperature pattern of a series of readings.

1. [1] “Traffic safety white paper,” 2007.
2. [2] A. Nozawa, H. Misawa, H. Tanaka, and H. Ide, “Evaluation of the mental work load of the driver about the conversation form by the face heat picture,” T. IEEJ, Vol.126, No7, pp. 804-809, 2006.
3. [3] R. Sakamoto, A. Nozawa, H. Tanaka, T. Mizuno, and H. Ide, “Evaluation of the driver’s temporary arousal level by facial skin thermogram –Effect of surrounding temperature and wind on the thermogram–,” T. IEEJ, Vol.126, No.7, pp. 804-809, 2005.
4. [4] Japanese physiology anthropology meeting, Measurement research section, “Human science measurement handbook,” Gihodo Shuppan, 1996.
5. [5] J. A. Healey and R. W. Picard, “Detecting Stress During Real-World Driving Tasks Using Physiological Sensors,” IEEE, Vol.6, No.2, pp. 156-166, 2005.
6. [6] H. Zeire et al., “Effects of work demands on IgA and cortisol in air traffic controllers,” Biol. Psychol, Vol.42, No.3, pp. 413-423, 1996.
7. [7] K. A. Brookhuis, D. D. Waard, and S. H. Fairclough, “Criteria for driver impairment,” ERGONOMICS, Vol.46, No.5, pp. 433-445, 2003.
8. [8] S. K. L. Lal and A. Craig, “Reproducibility of the spectral components of the electroencephalogram during driver fatigue,” Int. J. of Psychophysiology, Vol.55, No.2, pp. 137-143, 2005.
9. [9] M. Ueda, A. Kndo, H. Matumoto, H. Hayakawa, and T. Nakata, “A Study of Quantification for Driver’s Fatigue on Psychological and Physiological Response by Driving Experiment,” Committee of Infrastructure Planning and Management, JSCE, 2005.
10. [10] T. Taguchi, “Evaluation of Fatigue during Car Driving,” Toyota Central R&D Labs, Vol.33, No.4, 1998.
11. [11] T. Higashi, M. Yamaguchi, M. Deguchi, J. Wakasugi, and Y. Mizuno, “Monitor of sympathetic nervous system using salivary amylase activity and assessment of driving stress,” IEICE TECHNICAL REPORT, Vol.104, No.483, pp. 35-40, 2004.
12. [12] Y. Mizuno, “Human sensing,” YAMAHA MOTOR TECHNICAL REVIEW, 2004.
13. [13] S. K. L. Lala, A. Craiga, P. Boorda, L. Kirkupb, and H. Nguyen, “Development of an algorithm for an EEG-based driver fatigue countermeasure,” J. of Safety Research, Vol.34, No.3, pp. 321-328, 2003.
14. [14] Japanese society of fatigue science, “Anti-fatigue clinical evaluation guideline,” 2008.
15. [15] Y. Kitamura and T. Hatakeyama, “Effect of Workload on Driver: psychophysiological Approach,” IEICE TECHNICAL REPORT, Vol.103, No.590, pp. 33-37, 2004.
16. [16] A. Nozawa and H. Ide, “Emotion recognition by the circumference Nasal skin temperature,” Inspection technology, Vol.8, No.9, pp. 1-6, 2003.
17. [17] T. Shimomitsu, “The manual of present condition grasp of stress using the simple questionnaire of occupational stress,” Ministry of Health, 2005.