It exploded less than a month after it was implemented, injuring its policeman operator. The world's first traffic light was a manually operated gas-lit signal installed in London in December 1868. Traffic lights, traffic signals, stoplights or robots (as they are known in South Africa) are signalling devices positioned at road intersections, pedestrian crossings, and other locations to control flows of traffic. A traffic light in Jakarta, Indonesia with its count-down timer.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |