international day of the traffic light

Today 5 August 2017 is the international day of the traffic light.
Officially the first stop light was installed in the United States in 1914 were the only two-tone. However, attempts to install the stop light there were, for example, in 1868 in England, but the device was not technically perfect and it was removed.
It is interesting that for a long time in Japan enable signal the traffic light was not green but blue. But then still went to the traditional color.
In Russia, the first stop light appeared in 1930 in Leningrad on the corner of Nevsky and Foundry avenues, and later, in the same year, in the city of Moscow at the corner of Petrovka and Kuznetsk bridge. Later, the stop light was installed in Rostov-on-don.
And I personally remember this day song Leontief "stop light" and we run we run we run, and it burns.
Follow the traffic rules !

photo from : М.mylove.ru