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Publication of FR994088ApublicationCriticalpatent/FR994088A/fr
B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L29/00—Safety means for rail/road crossing traffic
B61L29/24—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning
B61L29/28—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning electrically operated
B61L29/32—Timing, e.g. advance warning of approaching train
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FR994088D1944-12-181944-12-18Procédé, appareil et installation d'annonce de circulations de véhicules
ExpiredFR994088A
(fr)