Federal Railroad Administration, DOT § 236.532

§ 236.513 Audible indicator. § 236.527 Roadway element insulation (a) The automatic cab signal system resistance. shall be so arranged that when the cab Insulation resistance between road- signal changes to display a more re- way inductor and ground shall be strictive aspect, an audible indicator maintained at not less than 10,000 will sound continuously until silenced ohms. by manual operation of an acknowl- [49 FR 3386, Jan. 26, 1984] edging device. (b) The audible cab indicator of auto- § 236.528 Restrictive condition result- matic cab signal, automatic , ing from open hand-operated or system switch; requirement. shall have a distinctive sound and be When a facing point hand-operated clearly audible throughout the cab switch is open one-fourth inch or more, under all operating conditions. a trailing point hand-operated switch three-eighths inch or more, or hand-op- [49 FR 3386, Jan. 26, 1984] erated switch is not locked where fac- § 236.514 Interconnection of cab signal ing point lock with circuit controller is system with roadway signal system. used, the resultant restrictive condi- tion of an automatic train stop or train The automatic cab signal system control device of the continuous type shall be interconnected with the road- or the resultant restrictive cab signal way-signal system so that the cab sig- indication of an automatic cab signal nal indication will not authorize oper- device on an approaching locomotive ation of the train at a speed higher shall be maintained to within 300 feet than that authorized by the indication of the points of the switch. of the roadway signal that governed the movement of a train into a block § 236.529 Roadway element inductor; except when conditions affecting move- height and distance from rail. ment of trains in the block change Inductor of the inert roadway ele- after the train passes the signal. ment type shall be maintained with the § 236.515 Visibility of cab signals. inductor pole faces at a height above the plane of the tops of the rails, and The cab signals shall be plainly visi- with its inner edge at a hmrizontal dis- ble to member or members of the loco- tance from the gage side of the nearest motive crew from their stations in the running rail, in accordance with speci- cab. fications of the carrier. [49 FR 3386, Jan. 26, 1984] [49 FR 3386, Jan. 26, 1984]

§ 236.516 Power supply. § 236.530 [Reserved] Automatic cab signal, train stop, or train control device hereafter installed § 236.531 Trip arm; height and dis- shall operate from a separate or iso- tance from rail. lated power supply. Trip arm of automatic train stop de- vice when in the stop position shall be [49 FR 3386, Jan. 26, 1984] maintained at a height above the plane RULES AND INSTRUCTIONS; ROADWAY of the tops of the rails, and at a hori- zontal distance from its center line to § 236.526 Roadway element not func- gage side of the nearest running rail, in tioning properly. accordance with specifications of the When a roadway element except carrier. of automatic train stop, [49 FR 3386, Jan. 26, 1984] train control or cab signal system is not functioning as intended, the signal § 236.532 Strap iron inductor; use re- associated with such roadway element stricted. shall be caused manually to display its No railroad shall use strap iron in- most restrictive aspect until such ele- ductor or other roadway element with ment has been restored to normal oper- characteristics differing from its ative condition. standard type on track where speed

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