"optical signalling system meaning traffic lights is not used in everyday parlance" in German 'Optical signalling system' meaning 'traffic lights' is not used in everyday parlance. 'Lichtsignalanlage' im Sinne von 'Ampel' ist in der Alltagssprache nicht gebräuchlich. Detailed translations for "optical signalling system meaning traffic lights is not used in everyday parlance" 'Optical signalling system' meaning 'traffic lights' is not used in everyday parlance. 'Optical signalling system' meaning 'traffic lights' is not used in everyday parlance. 'Lichtsignalanlage' im Sinne von 'Ampel' ist in der Alltagssprache nicht gebräuchlich.