Is a Form D line 4 needed for the Sperry Rail Car to test in ABS and DCS territory?

The assertion that a Form D line 4 is not needed for the Sperry Rail Car to test in ABS (Automatic Block Signal) and DCS (Direct Current Signal) territory is based on operational protocols that allow for certain types of testing to occur without the necessity of this specific form of authority.

In many rail operations, a Form D line 4 is typically required for movements that involve specific instructions or restrictions in terms of track occupancy or safety protocols. However, for the Sperry Rail Car, which is specialized in track inspection and testing, the operational guidelines generally permit it to conduct testing under Line 2 (which allows for the movement of an individual train within a specified corridor) and Line 3 (which allows for the train to occupy a main track at certain locations without the need for more stringent authority). This flexibility is important to facilitate maintenance and safety inspections of the rail infrastructure.

Thus, the requirement for Form D line 4 is waived in circumstances where the vehicles are specifically designated for testing, provided they comply with the safe operational protocols associated with their work. This reflects an understanding within the railroad's operational framework that balances efficiency and safety.