1.Previous
3.Next

In December 1868, the first traffic signals showing a red or green light at night were installed outside the Houses of Parliament in London. They were invented by John Peake Knight. A police constable raised or lowered the semaphore arms and, at night, operated a lever to control the lights which drivers and pedestrians saw. This system exploded on 2 January 1869 and was taken down. This early traffic signal led to other parts of the world implementing similar

1.Previous
3.Next