| 摘要 |
PROBLEM TO BE SOLVED: To facilitate discernment at night and in rainy weather by embedding a light transmission line for transmitting light from an emitter, in a road, and providing each outgoing end of the light transmission line with a lens for diffusing light from the emitter. SOLUTION: A battery and a timer are connected to an emitter 4 comprising a semiconductor laser or a light emission diode, and the emitter 4 and the like are covered with a light source part case to form a light source part. A light transmission line 8 comprising a quartz fiber or plastic optical fiber is formed. Each of four branched outgoing ends of the light transmission line 8 is provided with a lens 9, and the light transmission line 8 and lens 9 are covered with an indicating part case 7 and a cover 10 to form a display part. In construction work, the light source parts and display parts are alternately embedded on a road, and the emitter 4 is connected to the light transmission line 8. Discernment can thereby be facilitated even at night and in rainy weather. |
