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Traffic lights come in many different sizes and styles and there are always many other traffic signs around the traffic lights. Drivers have to concentrate hard to exclude visual disturbances and identify the right traffic signal they have to follow at the traffic lights. CEF traffic lights have different function modules with the same shape. They can be combined and installed freely according to traffic conditions. No matter how they are combined, their shape stays the same. This makes it easier for people to see the proper traffic signal.