Section 19-1043. ANACOSTIA RIVER DRAWBRIDGE  


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    1043.1The person in charge of the new Anacostia Bridge shall display a green semaphore by day and a green light at night upon each operation house while the draw is open, and a red flag by day and a red light at night at the center of the draw while the draw is closed.

     

    1043.2The semaphore shall be of sufficient size, and the lights of sufficient candlepower to be visible from a distance of at least one (1) mile.

     

    1043.3A person in charge of a boat or vessel desiring to pass the drawbridge shall signal approach to the bridge keeper by means of a horn or steam whistle.

     

source

Article 25 §§ 1 and 2 of the Police Regulations of the District of Columbia (January 1983).