What restriction applies to personal electronic device usage for railroad employees?

The restriction that applies to personal electronic device usage for railroad employees is that usage must comply with railroad policies. This means that employees are permitted to use personal electronic devices, but only in accordance with the guidelines and rules set forth by the railroad. These policies are designed to ensure safety and operational integrity, thereby minimizing distractions that could compromise the safety of employees and train operations.

Railroad policies often specify when and where these devices can be used and may include rules about usage during the performance of job duties, in the vicinity of moving trains, or in high-traffic areas. This option underscores the importance of following established procedures that prioritize safety while allowing for necessary communication and personal use of technology within designated parameters.

The other options suggest either total prohibition, limited usage only in emergencies, or use solely during breaks, which do not align with the flexible but regulated approach typically adopted in railroad policies.