level crossing warning signal usa crossbuck notice and red traffic light rail road intersection california railway |
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| navigate by keyword : abstract alertness america arm attention automated awareness barrier blue california caution chime city concepts construction crossbuck crossing crossroad crosswalk danger electric flash gate guarding indication information infrastructure intersection junction lamp level light metaphor notification pedestrian prohibited protection rail railroad railway red road safety semaphore sign signal signpost sky states stop sunshine symbol symbolic track traffic train transportation trip united usa warning |
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| Level crossing warning signal in USA. Crossbuck notice and red traffic light on rail road intersection in California. Railway transportation safety symbol. Caution sign about hazard and train track |
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