[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR221.13]

[Page 274]
 
                        TITLE 49--TRANSPORTATION
 
       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
PART 221_REAR END MARKING DEVICE_PASSENGER, COMMUTER AND FREIGHT TRAINS
 
                        Subpart B_Marking Devices
 
Sec.  221.13  Marking device display.


    (a) During the periods prescribed in paragraph (b) of this section, 
each train to which this part applies that occupies or operates on main 
track shall (1) be equipped with, (2) display on the trailing end of the 
rear car of that train, and (3) continuously illuminate or flash a 
marking device prescribed in this subpart.
    (b) Unless equipped with a functioning photoelectric cell activation 
mechanism complying with paragraph (c) of this section, the marking 
devices prescribed by this subpart shall be illuminated continuously or 
flash during the period between one hour before sunset and one hour 
after sunrise, and during all other hours when weather conditions so 
restrict visibility that the end silhouette of a standard box car cannot 
be seen from \1/2\ mile on tangent track by a person having 20/20 
corrected vision.
    (c) Marking devices prescribed by this part and equipped with a 
functioning photoelectric cell activation mechanism shall illuminate or 
flash the device continuously when there is less than 1.0 candela per 
square meter of ambient light.
    (d) The centroid of the marking device must be located at a minimum 
of 48 inches above the top of the rail.

[51 FR 25185, July 10, 1986]