OTD 2.1 January 2nd Traditional Cache

OTD - 2:1 

Perhaps you want a smiley for every day of the year or maybe a birthday smiley. For whatever reason these 12 mini monthly power trails are here to be found. Most are easily located, with an occasional sneaky one in the mix, sat lock can be difficult in some areas.

On This Day - January 2nd
 

World History

1869 - The world's first traffic light explodes, injuring the policeman operating it.

The world's first traffic light was operating in London, England, even before the advent of the automobile. Installed at a London intersection in 1868, it was a revolving gas-lit lantern with red and green signals. However, on 2 January 1869, the light exploded, injuring the policeman who was operating it. It was not until the early 1900s that Garrett Morgan, an African-American living in Cleveland, Ohio, developed the electric automatic traffic light, originally based on a semaphore-system.

Shortly after this, Detroit police officer William L Potts realised that a universal system would be needed. Potts developed the first 4-way three colour traffic light using red, amber, and green railroad lights. The first such light was installed on the corner of Woodward and Michigan Avenues in Detroit, in 1920. During the ensuing year, another 15 were installed throughout Detroit, proving to be such a success that they gradually spread to other major centres.