winter roads. To develop specifications for the danger-warning lamp light-emitting delineator (installation position, height of the light-emitting lamp, etc.), CERI conducted an moving-image CG experiment and a driving experiment with test drivers to survey user acceptability. In the CG experiment with subjects, the right side of the driving lanes (centre strip) was evaluated rated relatively highly as an installation position. Also, delineators with a guidance lamp at heights of 1.5-2.0 m were rated highly, as were delineators with distances from the danger-warning lamp of 0-0.5 m. Next, test drivers participated in an experiment on the test road, to survey operation behaviour with respect to flashing pattern, structure, and installation position of the light-emitting delineator. The experimental patterns were selected according to the results of the aforementioned CG experiment with subjects. Consequently, differences in driving behaviour were not found with respect to flashing pattern, lamp-distance, height of the visual-guidance lamp, and installation position of light-emitting delineators. The possible reason is that because the experimental conditions with a high level of user acceptability were chosen based on the CG experiment and for other reasons, differences were not conspicuous enough to be reflected in operation behaviour. In other words, the conditions set in this actual driving experiment are considered to provide a sufficient level of user acceptability. This series of experiments did not include survey on visibility of danger warning by light emission at the time of poor visibility and operation behaviour of test drivers in the absence of prior explanation on the purpose of such danger warning. In the future, experimental data on these will be collected to find light-emitting methods, colour of the light-emitting lamp, installation position, interval, and other factors of delineators that are highly acceptable to users, in order to develop fundamental specifications for the driving support system for cold regions.