[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: 49CFR236.326]

[Page 499-500]
 
                        TITLE 49--TRANSPORTATION
 
       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
 PART 236--RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND 
APPLIANCES--Table of Contents
 
                         Subpart C--Interlocking
 
Sec. 236.326  Mechanical locking removed or disarranged; requirement for permitting train movements through interlocking.

    When mechanical locking of interlocking machine is being changed or 
is removed from the machine, or locking becomes disarranged or broken, 
unless protection equivalent to mechanical locking is provided by 
electric locking or electric circuits, train movements through the 
interlocking shall not be permitted until each switch, movable-point 
frog or derail in the route is spiked, clamped or blocked in proper 
position so that it cannot be moved by its controlling lever, and then 
train movements shall not exceed restricted speed until the interlocking 
is restored to normal operation. It will not be necessary to comply with 
this requirement at interlockings where protection is in service in 
accordance with section 303, provided that the signal controls are 
arranged so that the signals cannot display an aspect the indication of

[[Page 500]]

which is less restrictive than ``proceed at restricted speed.''