PART 235—INSTRUCTIONS GOVERNING APPLICATIONS FOR APPROVAL OF A DISCONTINUANCE OR MATERIAL MODIFICATION OF A SIGNAL SYSTEM OR RELIEF FROM THE REQUIREMENTS OF PART 236
This part prescribes application for
approval to discontinue or materially
modify block signal systems,
interlockings, traffic control systems,
automatic train stop, train control, or
cab signal systems, or other similar appliances,
devices, methods, or systems,
and provides for relief from part 236 of
this title.