[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR222.53]

[Page 275]
 
                        TITLE 49--TRANSPORTATION
 
       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
PART 222_USE OF LOCOMOTIVE HORNS AT PUBLIC HIGHWAY-RAIL GRADE CROSSINGS
--Table of Contents
 
         Subpart C_Exceptions to the Use of the Locomotive Horn
 
Sec. 222.53  What are the requirements for supplementary and alternative 
safety measures?

    (a) Approved SSMs are listed in appendix A of this part.
    (b) Additional ASMs that may be included in a request for FRA 
approval of a quiet zone under Sec. 222.39(b) are listed in appendix B 
of this part.
    (c) The following do not, individually or in combination, constitute 
SSMs or ASMs: Standard traffic control device arrangements such as 
reflectorized crossbucks, STOP signs, flashing lights, or flashing 
lights with gates that do not completely block travel over the line of 
railroad, or traffic signals.