What dictates the allowances for riding on equipment with clearances?

The allowances for riding on equipment with clearances are determined by the timetable or special instructions. This is because these documents contain specific rules and regulations tailored to the operational needs and safety protocols of the railway. They are designed to ensure that all employees are aware of the limitations and requirements necessary to maintain safe practices while on the job.

Timetables and special instructions provide clear parameters that cover various scenarios, including those related to spacing and clearances, ensuring that employees understand the exact requirements for riding on or working around equipment. This information helps prevent accidents and injuries by clearly defining the limits and protocols that must be followed in different situations, rather than relying solely on general guidelines, personal judgment, or overarching company policies.