[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR236.203]

[Page 510-511]
 
                        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 B--Automatic Block Signal Systems
 
Sec. 236.203  Hand operated crossover between main tracks; protection.

    At hand-operated crossover between main tracks, protection shall be 
provided by one of the following:
    (a) An arrangement of one or more track circuits and switch circuit 
controllers,
    (b) Facing point locks on both switches of the crossover, with both 
locks operated by a single lever, or
    (c) Electric locking of the switches of the crossover. Signals 
governing movements over either switch shall display their most 
restrictive aspect when any of the following conditions exist:
    (1) Where protection is provided by one or more track circuits and 
switch

[[Page 511]]

circuit controllers, and either switch is open or the crossover is 
occupied by a train, locomotive or car in such a manner as to foul the 
main track. It shall not be a violation of this requirement where the 
presence of sand, rust, dirt, grease or other foreign matter on the rail 
prevents effective shunting;
    (2) Where facing point locks with a single lever are provided, and 
either switch is unlocked;
    (3) Where the switches are electrically locked, before the electric 
locking releases.