[Code of Federal Regulations]

[Title 49, Volume 4]

[Revised as of October 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 49CFR234.265]



[Page 591]

 

                        TITLE 49--TRANSPORTATION

 

       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 

                             TRANSPORTATION

 

PART 234_GRADE CROSSING SIGNAL SYSTEM SAFETY--Table of Contents

 

             Subpart D_Maintenance, Inspection, and Testing

 

Sec.  234.265  Timing relays and timing devices.



    Each timing relay and timing device shall be tested at least once 

every twelve months. The timing shall be maintained at not less than 90 

percent nor more than 110 percent of the 41 predetermined time interval. 

The predetermined time interval shall be shown on the plans or marked on 

the timing relay or timing device. Timing devices which perform internal 

functions associated with motion detectors, motion sensors, and grade 

crossing predictors are not subject to the requirements of this section.