Photo, Print, Drawing 34. Two lights on the western concrete counterweight on the south span. The two lights are used, in conjunction with visible guides on Terminal Island by the bridge operator to judge speed and position of the south span as it opens or closes. Based on the movement of the lights relative to each other and the background the south span is speeded up or slowed down and the brakes applied during the opening and closing process. View facing south. - Henry Ford Bridge, Spanning Cerritos Channel, Los Angeles-Long Beach Harbor, Los Angeles, Los Angeles County, CA Photos from Survey HAER CA-156

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