[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR234.263]

[Page 492]
 
                        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. 234.263  Relays.

    (a) Except as stated in paragraph (b) of this section, each relay 
that affects the proper functioning of a crossing warning system shall 
be tested at least once every four years.
    (b)(1) Alternating current vane type relays, direct current polar 
type relays, and relays with soft iron magnetic structure shall be 
tested at least once every two years.
    (2) Alternating current centrifugal type relays shall be tested at 
least once every 12 months.
    (c) Testing of relays requiring testing on four year intervals shall 
be completed in accordance with the following schedule:
    (1) Not less than 50% by the end of calendar year 1996;
    (2) Not less than a total of 75% by the end of calendar year 1997; 
and
    (3) One hundred percent by the end of calendar year 1998.
    (d) Testing of relays requiring testing on two year intervals shall 
be completed by the end of calendar year 1996.

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