[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR234.223]

[Page 476]
 
                        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. 234.223  Gate arm.

    Each gate arm, when in the downward position, shall extend across 
each lane of approaching highway traffic and shall be maintained in a 
condition sufficient to be clearly viewed by approaching highway users. 
Each gate arm shall start its downward motion not less than three 
seconds after flashing lights begin to operate and shall assume the 
horizontal position at least five seconds before the arrival of any 
normal train movement through the crossing. At those crossings equipped 
with four quadrant gates, the timing requirements of this section apply 
to entrance gates only.