Review of American Standard for Railroad Highway Grade Crossing Protection (D8.1-1943) which provides additional safety for such crossings by recommending automatically operated gates wherever railroad and highway traffic is heavy enough to warrant them; gates are designed to be lowered at predetermined interval after signal begins to operate. (See also Indus Standardization v 14 n 7 July 1943 p 214-6)
Signals for safety at railroad-highway crossings
Ry Signaling
Railway Signaling ; 36 , n 9
1943
2 pages
Aufsatz (Zeitschrift)
Englisch
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