Title 49

PART 236 SUBPART E

Subpart E - Automatic Train Stop, Train Control and Cab Signal Systems

• 49 U.S.C. 20102-20103, 20107, 20133, 20141, 20157, 20301-20303, 20306, 20501-20505, 20701-20703, 21301-21302, 21304; 28 U.S.C. 2461, note; and 49 CFR 1.89.
• 33 FR 19684, Dec. 25, 1968, unless otherwise noted.

49:4.1.1.1.30.5.119	SUBJGRP 119	Standards
49:4.1.1.1.30.5.119.1	SECTION 236.501	236.501 Forestalling device and speed control.
49:4.1.1.1.30.5.119.2	SECTION 236.502	236.502 Automatic brake application, initiation by restrictive block conditions stopping distance in advance.
49:4.1.1.1.30.5.119.3	SECTION 236.503	236.503 Automatic brake application; initiation when predetermined rate of speed exceeded.
49:4.1.1.1.30.5.119.4	SECTION 236.504	236.504 Operation interconnected with automatic block-signal system.
49:4.1.1.1.30.5.119.5	SECTION 236.505	236.505 Proper operative relation between parts along roadway and parts on locomotive.
49:4.1.1.1.30.5.119.6	SECTION 236.506	236.506 Release of brakes after automatic application.
49:4.1.1.1.30.5.119.7	SECTION 236.507	236.507 Brake application; full service.
49:4.1.1.1.30.5.119.8	SECTION 236.508	236.508 Interference with application of brakes by means of brake valve.
49:4.1.1.1.30.5.119.9	SECTION 236.509	236.509 Two or more locomotives coupled.
49:4.1.1.1.30.5.119.10	SECTION 236.510	236.510 [Reserved]
49:4.1.1.1.30.5.119.11	SECTION 236.511	236.511 Cab signals controlled in accordance with block conditions stopping distance in advance.
49:4.1.1.1.30.5.119.12	SECTION 236.512	236.512 Cab signal indication when locomotive enters block where restrictive conditions obtain.
49:4.1.1.1.30.5.119.13	SECTION 236.513	236.513 Audible indicator.
49:4.1.1.1.30.5.119.14	SECTION 236.514	236.514 Interconnection of cab signal system with roadway signal system.
49:4.1.1.1.30.5.119.15	SECTION 236.515	236.515 Visibility of cab signals.
49:4.1.1.1.30.5.119.16	SECTION 236.516	236.516 Power supply.
49:4.1.1.1.30.5.120	SUBJGRP 120	Rules and Instructions; Roadway
49:4.1.1.1.30.5.120.17	SECTION 236.526	236.526 Roadway element not functioning properly.
49:4.1.1.1.30.5.120.18	SECTION 236.527	236.527 Roadway element insulation resistance.
49:4.1.1.1.30.5.120.19	SECTION 236.528	236.528 Restrictive condition resulting from open hand-operated switch; requirement.
49:4.1.1.1.30.5.120.20	SECTION 236.529	236.529 Roadway element inductor; height and distance from rail.
49:4.1.1.1.30.5.120.21	SECTION 236.530	236.530 [Reserved]
49:4.1.1.1.30.5.120.22	SECTION 236.531	236.531 Trip arm; height and distance from rail.
49:4.1.1.1.30.5.120.23	SECTION 236.532	236.532 Strap iron inductor; use restricted.
49:4.1.1.1.30.5.120.24	SECTION 236.533	236.533 [Reserved]
49:4.1.1.1.30.5.120.25	SECTION 236.534	236.534 Entrance to equipped territory; requirements.
49:4.1.1.1.30.5.121	SUBJGRP 121	Rules and Instructions; Locomotives
49:4.1.1.1.30.5.121.26	SECTION 236.551	236.551 Power supply voltage; requirement.
49:4.1.1.1.30.5.121.27	SECTION 236.552	236.552 Insulation resistance; requirement.
49:4.1.1.1.30.5.121.28	SECTION 236.553	236.553 Seal, where required.
49:4.1.1.1.30.5.121.29	SECTION 236.554	236.554 Rate of pressure reduction; equalizing reservoir or brake pipe.
49:4.1.1.1.30.5.121.30	SECTION 236.555	236.555 Repaired or rewound receiver coil.
49:4.1.1.1.30.5.121.31	SECTION 236.556	236.556 Adjustment of relay.
49:4.1.1.1.30.5.121.32	SECTION 236.557	236.557 Receiver; location with respect to rail.
49:4.1.1.1.30.5.121.33	SECTION 236.558-236.559	236.558-236.559 [Reserved]
49:4.1.1.1.30.5.121.34	SECTION 236.560	236.560 Contact element, mechanical trip type; location with respect to rail.
49:4.1.1.1.30.5.121.35	SECTION 236.561	236.561 [Reserved]
49:4.1.1.1.30.5.121.36	SECTION 236.562	236.562 Minimum rail current required.
49:4.1.1.1.30.5.121.37	SECTION 236.563	236.563 Delay time.
49:4.1.1.1.30.5.121.38	SECTION 236.564	236.564 Acknowledging time.
49:4.1.1.1.30.5.121.39	SECTION 236.565	236.565 Provision made for preventing operation of pneumatic brake-applying apparatus by double-heading cock; requirement.
49:4.1.1.1.30.5.121.40	SECTION 236.566	236.566 Locomotive of each train operating in train stop, train control or cab signal territory; equipped.
49:4.1.1.1.30.5.121.41	SECTION 236.567	236.567 Restrictions imposed when device fails and/or is cut out en route.
49:4.1.1.1.30.5.121.42	SECTION 236.568	236.568 Difference between speeds authorized by roadway signal and cab signal; action required.
49:4.1.1.1.30.5.122	SUBJGRP 122	Inspection and Tests; Roadway
49:4.1.1.1.30.5.122.43	SECTION 236.576	236.576 Roadway element.
49:4.1.1.1.30.5.122.44	SECTION 236.577	236.577 Test, acknowledgement, and cut-in circuits.
49:4.1.1.1.30.5.123	SUBJGRP 123	Inspection and Tests; Locomotive
49:4.1.1.1.30.5.123.45	SECTION 236.586	236.586 Daily or after trip test.
49:4.1.1.1.30.5.123.46	SECTION 236.587	236.587 Departure test.
49:4.1.1.1.30.5.123.47	SECTION 236.588	236.588 Periodic test.
49:4.1.1.1.30.5.123.48	SECTION 236.589	236.589 Relays.
49:4.1.1.1.30.5.123.49	SECTION 236.590	236.590 Pneumatic apparatus.

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