It is known that higher brain dysfunction is examined due to traffic accidents or cerebrovascular disorders. And its incidence is estimated to be 50 to 70 per 100,000 people. It is expected that 80 to 90％ of which should reconsider resuming vehicle driving. As such, the demand for the inspection of vehicle driving resumption for the patients with higher brain dysfunction has increased. For the vehicle driving, attention function to respond to the changing situations is required. Therefore, people with attention deficits are chosen to experiment, who have high occurrence rate among higher brain dysfunction and have the symptoms that attention function decreases in vehicle driving. In this research, by extracting searching the features of attention deficits, it is set as research objective to evaluate the attention function to become a new indicator for vehicle driving resumption. As a proposed system, by acquiring quantitative data which was unmeasurable in the past, we have developed an evaluation support system that can measure the attention function related data all together by a single examination. We implemented Trail Making Test （TMT） into smart device which is used widely in inspection of attention deficits. Furthermore, the method of search is measured using the gaze measuring sensor during the examination. In this paper, we applied the proposed system consisting of three healthy subjects aged of 20’s, three 80’s and seven attention deficits. In the healthy subject group, there was no difference by aging the way of searching. On the other hand, it is confirmed in attention deficits group that they gaze their hands first after discovering the target object and then gaze at different direction. This is considered as divided or sustained attention is weak and it is done as compensating to their own attention. If this action really happens while driving of vehicle, there is a possibility that correct attention cannot be paid to where it should be. We considered that this is an important factor in driving and concluded that it would be a new indicator for driving correctly.

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To investigate seatbelt wearing and to perform effective safety education, we conducted questionnaire surveys of pregnant women. The subjects were 82 women in early to late pregnancy who visited obstetrics and gynecology outpatient clinics. Most of the women （98.8%） wore a seatbelt while riding a vehicle, but one woman in the late term of pregnancy who mostly sat in the rear seats did not wear a seatbelt. Among pregnant female seatbelt wearers, 76.5% correctly placed the seatbelt, however, 23.5% positioned the seatbelt inappropriately. The prevalence of correct seatbelt use is significantly higher in women in the late term of pregnancy than those in the early term of pregnancy （p 0.05）. With regard to inappropriate methods of use, “the lap belt crossing over the abdomen” was most common （31.6%） followed by “the shoulder belt crossing over the abdomen” （26.3%） and “the lap belt crossing over the thighs” （21.1%）. When these methods are used, the seatbelt compresses the protruding abdomen, or the passenger is insufficiently restricted in the event of a collision. Even when wearing seatbelts, pregnant passengers may suffer from severe injuries in a vehicle collision similar to those that occur when not wearing a seatbelt. Although the importance of wearing a seatbelt is widely recognized, knowledge of correct seatbelt wearing methods for pregnant women is not widely understood. Accordingly, correct seatbelt-positioning techniques for pregnant women and their families should be promoted through educational venues such as mother’s classes, parenting classes, or during outpatient care by midwives.

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In recent years, the number of elderly people who have driver's licenses is increasing along with the increasing aging rate of society, and this trend is expected to continue in the future. Relating to this, there is a possibility that accidents caused by erroneous pedal stepping by elderly drivers may increase. While the recent development of automated driving technology and advanced car safety technology can greatly contribute to the reduction of accidents, it takes a long time before vehicles with these technologies are implemented on the roads. Therefore, accident preventive measures have to be considered in tandem with the development of the aforementioned technologies. In this research, we focus on the pedal work of elderly drivers that will be elaborated later. The purpose is to measure and analyze the pedal work during sudden braking, and clarify the cause of accidents. For this purpose, we developed a driving simulator combining virtual reality technology, motion capture technology and head mounted display. Furthermore, by setting virtual pedestrians to jump out suddenly in our experiment setup, we were able to study the characteristics of elderly drivers by analyzing the behaviors of young and elderly drivers when avoiding accidents. The pedal work when a driver brakes is composed of three steps, namely “release the foot from the accelerator”, “move the foot to the brake” and “step on the brake”. In this thesis, “the time it took the driver to release his foot from the accelerator after the pedestrian jumped into the roadway”, “the time it took the driver to move his foot from the accelerator to the brake” and “total locomotion length of the driver’s right big toe for 10 seconds after the pedestrian starts crossing” were investigated. As a result, it was revealed that the ratio of avoidance by braking rather than steering tends to be as high as 60% for elderly people compared to 43% for young people. In addition, the pedal work of elderly at the time of sudden braking was slow and unstable. From the above, we conclude that pedal work which is unsuitable for the vehicle speed is a factor of accidents.

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In the collision accident of a bicycle and a car, the damage of a cyclist is often severe. In statistical data, 30% of injured people due to bicycle accidents are minors. For these reasons, safety measures for child cyclist are one of the most important tasks for traffic safety. In order to reduce the damage of child bicycle accident, we tried to analyze by actual car crash experiment. From the experiments, we examined the relationship between the behavior of the cyclist at the time of a collision and the head injury. We conducted a collision experiment assuming an accident of encounter with station wagon type car and child bicycle. The bicycle got a 6 years old dummy. The bicycle hit the center part and the side end part of the front face of the car. As a comparative experiment, we conducted a collision experiment with a semi-cab over car and a pedestrian collision experiment. When bicycle collides with the center part of the front of the car, the dummy shoulder and arm come into contact with the car, so that the collision speed between the dummy head and the vehicle is low. Therefore, the value of Head Injury Criterion （HIC） was low. A bicycle hits the side end of the front of the car, the dummy body rotates at the time of a collision. As a result, the back of the dummy comes into contact with the part with high rigidity. It shows high HIC value. The value of HIC due to the collision between the road surface and the dummy greatly affects the dummy falling posture. The dummy falls from the foot, the HIC becomes low. On the other hand, when the dummy falls off the head, the HIC value becomes very high.

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