[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: 49CFR222.21]

[Page 266-267]
 
                        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 B_Use of Locomotive Horns
 
Sec. 222.21  When must a locomotive horn be used?


    (a) Except as provided in this part, the locomotive horn on the lead 
locomotive of a train, lite locomotive consist, individual locomotive, 
or lead cab car shall be sounded when such locomotive or lead car is 
approaching and passes through each public highway-rail grade crossing. 
Sounding of the locomotive horn with two long, one short, and one long 
blast shall be initiated at a location so as to be in accord with 
paragraph (b) of this section and shall be repeated or prolonged until 
the locomotive or train occupies the crossing. This pattern may be 
varied as necessary where crossings are spaced closely together.
    (b) The locomotive horn shall begin to be sounded at least 15 
seconds, but no more than 20 seconds, before the locomotive enters the 
crossing, but in no event shall a locomotive horn sounded in accordance 
with paragraph (a) of this section be sounded more than one-quarter mile 
(1,320 feet) in advance of

[[Page 267]]

the nearest public highway-rail grade crossing.