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Code of Federal Regulations (Last Updated: November 8, 2024) |
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Title 49 - Transportation |
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Subtitle B - Other Regulations Relating to Transportation |
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Chapter II - Federal Railroad Administration, Department of Transportation |
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Part 236 - Rules, Standards, and Instructions Governing the Installation, Inspection, Maintenance, and Repair of Signal and Train Control Systems, Devices, and Appliances |
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Subpart A - Rules and Instructions: All Systems |
| Track Circuits |
| § 236.51 - Track circuit requirements. |
| § 236.52 - Relayed cut-section. |
| § 236.53 - Track circuit feed at grade crossing. |
| § 236.54 - Minimum length of track circuit. |
| § 236.55 - Dead section; maximum length. |
| § 236.56 - Shunting sensitivity. |
| § 236.57 - Shunt and fouling wires. |
| § 236.58 - Turnout, fouling section. |
| § 236.59 - Insulated rail joints. |
| § 236.60 - Switch shunting circuit; use restricted. |
| Roadway Signals and Cab Signals |
| § 236.21 - Location of roadway signals. |
| § 236.22 - Semaphore signal arm; clearance to other objects. |
| § 236.23 - Aspects and indications. |
| § 236.24 - Spacing of roadway signals. |
| § 236.25 - [Reserved] |
| § 236.26 - Buffing device, maintenance. |
| Wires and Cables |
| § 236.71 - Signal wires on pole line and aerial cable. |
| § 236.72 - [Reserved] |
| § 236.73 - Open-wire transmission line; clearance to other circuits. |
| § 236.74 - Protection of insulated wire; splice in underground wire. |
| § 236.75 - [Reserved] |
| § 236.76 - Tagging of wires and interference of wires or tags with signal apparatus. |
| Inspections and Tests; All Systems |
| § 236.101 - Purpose of inspection and tests; removal from service of relay or device failing to meet test requirements. |
| § 236.102 - Semaphore or searchlight signal mechanism. |
| § 236.103 - Switch circuit controller or point detector. |
| § 236.104 - Shunt fouling circuit. |
| § 236.105 - Electric lock. |
| § 236.106 - Relays. |
| § 236.107 - Ground tests. |
| § 236.108 - Insulation resistance tests, wires in trunking and cables. |
| § 236.109 - Time releases, timing relays and timing devices. |
| § 236.110 - Results of tests. |
| General |
| § 236.1 - Plans, where kept. |
| § 236.2 - Grounds. |
| § 236.3 - Locking of signal apparatus housings. |
| § 236.4 - Interference with normal functioning of device. |
| § 236.5 - Design of control circuits on closed circuit principle. |
| § 236.6 - Hand-operated switch equipped with switch circuit controller. |
| § 236.7 - Circuit controller operated by switch-and-lock movement. |
| § 236.8 - Operating characteristics of electromagnetic, electronic, or electrical apparatus. |
| § 236.9 - Selection of circuits through indicating or annunciating instruments. |
| § 236.10 - Electric locks, force drop type; where required. |
| § 236.11 - Adjustment, repair, or replacement of component. |
| § 236.12 - Spring switch signal protection; where required. |
| § 236.13 - Spring switch; selection of signal control circuits through circuit controller. |
| § 236.14 - Spring switch signal protection; requirements. |
| § 236.15 - Timetable instructions. |
| § 236.16 - Electric lock, main track releasing circuit. |
| § 236.17 - Pipe for operating connections, requirements. |
| § 236.18 - Software management control plan. |