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HEIDT GUNTER DT
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Publication of FR2189803A1publicationCriticalpatent/FR2189803A1/fr
G08G1/00—Traffic control systems for road vehicles
G08G1/09—Arrangements for giving variable traffic instructions
G08G1/096—Arrangements for giving variable traffic instructions provided with indicators in which a mark progresses showing the time elapsed, e.g. of green phase