| 49:4.1.1.1.28.1 | SUBPART A 
 | Subpart A - General |  | 
| 49:4.1.1.1.28.1.86.1 | SECTION 234.1 
 | 234.1 Scope. |  | 
| 49:4.1.1.1.28.1.86.2 | SECTION 234.3 
 | 234.3 Application and responsibility for compliance. |  | 
| 49:4.1.1.1.28.1.86.3 | SECTION 234.5 
 | 234.5 Definitions. |  | 
| 49:4.1.1.1.28.1.86.4 | SECTION 234.6 
 | 234.6 Penalties. |  | 
| 49:4.1.1.1.28.2 | SUBPART B 
 | Subpart B - Reports and Plans |  | 
| 49:4.1.1.1.28.2.86.1 | SECTION 234.7 
 | 234.7 Accidents involving grade crossing signal failure. |  | 
| 49:4.1.1.1.28.2.86.2 | SECTION 234.9 
 | 234.9 Grade crossing signal system failure reports. |  | 
| 49:4.1.1.1.28.2.86.3 | SECTION 234.11 
 | 234.11 State highway-rail grade crossing action plans. |  | 
| 49:4.1.1.1.28.3 | SUBPART C 
 | Subpart C - Response to Credible Reports of Warning System Malfunction at Highway-Rail Grade Crossings |  | 
| 49:4.1.1.1.28.3.86.1 | SECTION 234.101 
 | 234.101 Employee notification rules. |  | 
| 49:4.1.1.1.28.3.86.2 | SECTION 234.103 
 | 234.103 Timely response to report of malfunction. |  | 
| 49:4.1.1.1.28.3.86.3 | SECTION 234.105 
 | 234.105 Activation failure. |  | 
| 49:4.1.1.1.28.3.86.4 | SECTION 234.106 
 | 234.106 Partial activation. |  | 
| 49:4.1.1.1.28.3.86.5 | SECTION 234.107 
 | 234.107 False activation. |  | 
| 49:4.1.1.1.28.3.86.6 | SECTION 234.109 
 | 234.109 Recordkeeping. |  | 
| 49:4.1.1.1.28.4 | SUBPART D 
 | Subpart D - Maintenance, Inspection, and Testing |  | 
| 49:4.1.1.1.28.4.86 | SUBJGRP 86 
 | Maintenance Standards |  | 
| 49:4.1.1.1.28.4.86.1 | SECTION 234.201 
 | 234.201 Location of plans. |  | 
| 49:4.1.1.1.28.4.86.2 | SECTION 234.203 
 | 234.203 Control circuits. |  | 
| 49:4.1.1.1.28.4.86.3 | SECTION 234.205 
 | 234.205 Operating characteristics of warning system apparatus. |  | 
| 49:4.1.1.1.28.4.86.4 | SECTION 234.207 
 | 234.207 Adjustment, repair, or replacement of component. |  | 
| 49:4.1.1.1.28.4.86.5 | SECTION 234.209 
 | 234.209 Interference with normal functioning of system. |  | 
| 49:4.1.1.1.28.4.86.6 | SECTION 234.211 
 | 234.211 Security of warning system apparatus. |  | 
| 49:4.1.1.1.28.4.86.7 | SECTION 234.213 
 | 234.213 Grounds. |  | 
| 49:4.1.1.1.28.4.86.8 | SECTION 234.215 
 | 234.215 Standby power system. |  | 
| 49:4.1.1.1.28.4.86.9 | SECTION 234.217 
 | 234.217 Flashing light units. |  | 
| 49:4.1.1.1.28.4.86.10 | SECTION 234.219 
 | 234.219 Gate arm lights and light cable. |  | 
| 49:4.1.1.1.28.4.86.11 | SECTION 234.221 
 | 234.221 Lamp voltage. |  | 
| 49:4.1.1.1.28.4.86.12 | SECTION 234.223 
 | 234.223 Gate arm. |  | 
| 49:4.1.1.1.28.4.86.13 | SECTION 234.225 
 | 234.225 Activation of warning system. |  | 
| 49:4.1.1.1.28.4.86.14 | SECTION 234.227 
 | 234.227 Train detection apparatus. |  | 
| 49:4.1.1.1.28.4.86.15 | SECTION 234.229 
 | 234.229 Shunting sensitivity. |  | 
| 49:4.1.1.1.28.4.86.16 | SECTION 234.231 
 | 234.231 Fouling wires. |  | 
| 49:4.1.1.1.28.4.86.17 | SECTION 234.233 
 | 234.233 Rail joints. |  | 
| 49:4.1.1.1.28.4.86.18 | SECTION 234.235 
 | 234.235 Insulated rail joints. |  | 
| 49:4.1.1.1.28.4.86.19 | SECTION 234.237 
 | 234.237 Reverse switch cut-out circuit. |  | 
| 49:4.1.1.1.28.4.86.20 | SECTION 234.239 
 | 234.239 Tagging of wires and interference of wires or tags with signal apparatus. |  | 
| 49:4.1.1.1.28.4.86.21 | SECTION 234.241 
 | 234.241 Protection of insulated wire; splice in underground wire. |  | 
| 49:4.1.1.1.28.4.86.22 | SECTION 234.243 
 | 234.243 Wire on pole line and aerial cable. |  | 
| 49:4.1.1.1.28.4.86.23 | SECTION 234.245 
 | 234.245 Signs. |  | 
| 49:4.1.1.1.28.4.87 | SUBJGRP 87 
 | Inspections and Tests |  | 
| 49:4.1.1.1.28.4.87.24 | SECTION 234.247 
 | 234.247 Purpose of inspections and tests; removal from service of relay or device failing to meet test requirements. |  | 
| 49:4.1.1.1.28.4.87.25 | SECTION 234.249 
 | 234.249 Ground tests. |  | 
| 49:4.1.1.1.28.4.87.26 | SECTION 234.251 
 | 234.251 Standby power. |  | 
| 49:4.1.1.1.28.4.87.27 | SECTION 234.253 
 | 234.253 Flashing light units and lamp voltage. |  | 
| 49:4.1.1.1.28.4.87.28 | SECTION 234.255 
 | 234.255 Gate arm and gate mechanism. |  | 
| 49:4.1.1.1.28.4.87.29 | SECTION 234.257 
 | 234.257 Warning system operation. |  | 
| 49:4.1.1.1.28.4.87.30 | SECTION 234.259 
 | 234.259 Warning time. |  | 
| 49:4.1.1.1.28.4.87.31 | SECTION 234.261 
 | 234.261 Highway traffic signal pre-emption. |  | 
| 49:4.1.1.1.28.4.87.32 | SECTION 234.263 
 | 234.263 Relays. |  | 
| 49:4.1.1.1.28.4.87.33 | SECTION 234.265 
 | 234.265 Timing relays and timing devices. |  | 
| 49:4.1.1.1.28.4.87.34 | SECTION 234.267 
 | 234.267 Insulation resistance tests, wires in trunking and cables. |  | 
| 49:4.1.1.1.28.4.87.35 | SECTION 234.269 
 | 234.269 Cut-out circuits. |  | 
| 49:4.1.1.1.28.4.87.36 | SECTION 234.271 
 | 234.271 Insulated rail joints, bond wires, and track connections. |  | 
| 49:4.1.1.1.28.4.87.37 | SECTION 234.273 
 | 234.273 Results of inspections and tests. |  | 
| 49:4.1.1.1.28.4.88 | SUBJGRP 88 
 | Requirements for Processor-Based Systems |  | 
| 49:4.1.1.1.28.4.88.38 | SECTION 234.275 
 | 234.275 Processor-based systems. |  | 
| 49:4.1.1.1.28.5 | SUBPART E 
 | Subpart E - Emergency Notification Systems for Telephonic Reporting of Unsafe Conditions at Highway-Rail and Pathway Grade Crossings |  | 
| 49:4.1.1.1.28.5.89.1 | SECTION 234.301 
 | 234.301 Definitions. |  | 
| 49:4.1.1.1.28.5.89.2 | SECTION 234.303 
 | 234.303 Emergency notification systems for telephonic reporting of unsafe conditions at highway-rail and pathway grade crossings. |  | 
| 49:4.1.1.1.28.5.89.3 | SECTION 234.305 
 | 234.305 Remedial actions in response to reports of unsafe conditions at highway-rail and pathway grade crossings. |  | 
| 49:4.1.1.1.28.5.89.4 | SECTION 234.306 
 | 234.306 Multiple dispatching or maintaining railroads with respect to the same highway-rail or pathway grade crossing; appointment of responsible railroad. |  | 
| 49:4.1.1.1.28.5.89.5 | SECTION 234.307 
 | 234.307 Use of third-party telephone service by dispatching and maintaining railroads. |  | 
| 49:4.1.1.1.28.5.89.6 | SECTION 234.309 
 | 234.309 ENS signs in general. |  | 
| 49:4.1.1.1.28.5.89.7 | SECTION 234.311 
 | 234.311 ENS sign placement and maintenance. |  | 
| 49:4.1.1.1.28.5.89.8 | SECTION 234.313 
 | 234.313 Recordkeeping. |  | 
| 49:4.1.1.1.28.5.89.9 | SECTION 234.315 
 | 234.315 Electronic recordkeeping. |  | 
| 49:4.1.1.1.28.5.89.10 | SECTION 234.317 
 | 234.317 Compliance dates. |  | 
| 49:4.1.1.1.28.6 | SUBPART F 
 | Subpart F - Highway-Rail and Pathway Crossing Inventory Reporting |  | 
| 49:4.1.1.1.28.6.89.1 | SECTION 234.401 
 | 234.401 Definitions. |  | 
| 49:4.1.1.1.28.6.89.2 | SECTION 234.403 
 | 234.403 Submission of data to the Crossing Inventory, generally. |  | 
| 49:4.1.1.1.28.6.89.3 | SECTION 234.405 
 | 234.405 Submission of initial data to the Crossing Inventory for previously unreported crossings. |  | 
| 49:4.1.1.1.28.6.89.4 | SECTION 234.407 
 | 234.407 Submission of initial data to the Crossing Inventory for new crossings. |  | 
| 49:4.1.1.1.28.6.89.5 | SECTION 234.409 
 | 234.409 Submission of periodic updates to the Crossing Inventory. |  | 
| 49:4.1.1.1.28.6.89.6 | SECTION 234.411 
 | 234.411 Changes requiring submission of updated information to the Crossing Inventory. |  | 
| 49:4.1.1.1.28.6.89.7 | SECTION 234.413 
 | 234.413 Recordkeeping. |  | 
| 49:4.1.1.1.28.6.89.8 | SECTION 234.415 
 | 234.415 Electronic recordkeeping. |  | 
| 49:4.1.1.1.28.7 | SUBPART 0 
 |  |  | 
| 49:4.1.1.1.28.8.89.1.62 | APPENDIX Appendix A 
 | Appendix A to Part 234 [Reserved] |  | 
| 49:4.1.1.1.28.8.89.1.63 | APPENDIX Appendix B 
 | Appendix B to Part 234 - Alternate Methods of Protection Under 49 CFR 234.105(c), 234.106, and 234.107(c) |  |