49 C.F.R. § 236.512 Cab signal indication when locomotive enters block where restrictive conditions obtain.
Title 49 - Transportation
The automatic cab signal system shall be arranged so that when a locomotive enters or is within a block, wherein any condition described in §236.205 obtains, the cab signals shall indicate “Proceed at Restricted Speed.”
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 E—Automatic Train Stop, Train Control and Cab Signal Systems
Standards
§ 236.512 Cab signal indication when locomotive enters block where restrictive conditions obtain.
