| 摘要 |
PROBLEM TO BE SOLVED: To form a road safely instrument having the same shape as all road boundary blocks in the same form as a road owing to a design that an instrument unit is introduced into the safely instrument. SOLUTION: In the road safely instrument exclusive to a road, the shut-out of cars in a no parking area, the of a bifurcation point, a median strip, a shoulder in an ordinary road expressway or the like can be quickly, confirmed hence, accidents can be prevented. |
