49 C.F.R. § 236.401 Automatic block signal system and interlocking standards applicable to traffic control systems.
Title 49 - Transportation
The standards prescribed in §§236.201, to 236.203, inclusive, §§236.205, 236.206, 236.303, 236.307 and 236.309 to 236.311, inclusive, shall apply to traffic control systems. [49 FR 3385, Jan. 26, 1984]
Title 49: Transportation
PART 236—RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES
Subpart D—Traffic Control Systems
Standards
§ 236.401 Automatic block signal system and interlocking standards applicable to traffic control systems.