[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: 49CFR234.257]

[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. 234.257  Warning system operation.

    (a) Each highway-rail crossing warning system shall be tested to 
determine that it functions as intended when it is placed in service. 
Thereafter, it shall be tested at least once each month and whenever 
modified or disarranged.
    (b) Warning bells or other stationary audible warning devices shall 
be tested when installed to determine that they function as intended. 
Thereafter, they shall be tested at least once each month and whenever 
modified or disarranged.