Is a Form D line 4 required to take tracks out-of-service for a weed sprayer in ABS and DCS territory?

A Form D line 4 is not required to take tracks out of service for a weed sprayer operating in Automatic Block Signal (ABS) and Direct Current Signaling (DCS) territory because this equipment can function under certain conditions with the existing authority provided by Line 2 and Line 3.

Line 2 authority generally allows the train to operate at restricted speeds, which is adequate for maintenance activities such as weed spraying. Line 3 authority typically allows for greater operational flexibility but still ensures that the sprayer is safeguarded without the need for an additional Form D line 4 when the work does not obstruct traffic patterns significantly or endanger operational safety.

This operational context is significant because it highlights the allowances and flexibility that exist for certain maintenance tasks without the added complexity and requirement of a line 4, which is usually reserved for more significant disruptions or complete blockages of tracks. Understanding these details is crucial for dispatchers and personnel operating in these territories.