In daily life, we often see large vehicles on the road . However, we observe that the place put warning tools are very narrow . Let passerby in dangerous, when the wareing tools have terrible visibility . As a result , the number of warning tools placed on the roadside for large vehicles is insufficient . KAKOKU can adjust its shape according to the situations . KAKOKU′s components built with modular design . Each of the part in the middle of KAKOKU structure moves up and down . KAKOKU to be placement at the road, which are not smooth . The structure with the latch which can folding to stored,at front and back side . One of the part idea of the vent originates from triangle warning signs . The second part use the reflective strip to make the sign more significant . The third part open to easy user pass in and out . Useing pattern is put and unfold . The design direction is form folding storage , simple use , quick to placement . After unfolding the full length is 800 centimeter .