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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
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FR672908D1928-04-111929-04-10Dispositif de signalisation réglant la circulation aux croisements de rues et applications analogues
ExpiredFR672908A
(fr)