| 摘要 |
PURPOSE: A laser a lay automatic a traffic light is provided to reduce accidents by notifying a driver and a pedestrian of the current circumstances of traffic signals. CONSTITUTION: A green light signal(113) of a traffic light is turned on. A laser(119) is projected at the setting time of a timer. The traffic light aims at a circular guide on the opposite side of a driving road with a laser beam. The laser is turned off once the green light signal is turned off. |
