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Photographer's Note

The common arrangement of traffic lights consists of the three colours red over yellow over green. Which is generally understood, although french humourists claim that a red light in their country will only be regarded as a proposal to stop...

This is the way traffic regulation was done in the Netherlands, Austria and Germany before the international scheme was introduced: the so-called "Heuer-Ampel".

The rotating white pointer indicated either green (free ride) or red (stop!). Its position allowed the driver to anticipate whether he would be able to pass the crossroads in time or not. Getting caught by a surprisingly shining yellow light was impossible. As both perspectives on the device are depicted here, you can see that both directions have common red phases for security.

The disadvantage of this type, hanging over the crossroads' center, was its poor visibility, which led to its abolition in 1972.

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Additional Photos by Sven Erich Czernik (Energysavingelk) Gold Star Critiquer/Gold Note Writer [C: 351 W: 1 N: 924] (4495)
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