Traffic lights were first introduced on the streets of Amsterdam in 1932, when a set of lights was installed on the Leidseplein in the centre of the city. In 2012 the number of traffic lights in Amsterdam has grown into the hundreds.
The History of Traffic Lights in Amsterdam is a Google Map that shows how the number of traffic lights has grown and spread out across Amsterdam since those first set of lights started controlling the traffic in 1932. The map sidebar includes a number of radio buttons that allow the user to view where traffic lights were installed in the city in successive decades from the 1930's.
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