Best Practices for Designing Vision Field Tests for Locomotive Engineers or Conductors

FRA is issuing this interim interpretation to clarify provisions in its locomotive engineer and conductor qualification and certification regulations with respect to vision standards and testing. In particular, this document addresses further evaluation of persons who do not meet the vision threshold criteria provided for in those regulations, and provides best practices guidance for designing valid, reliable, and comparable vision field tests for assessing whether persons who do not meet those thresholds can perform safely as locomotive engineers and conductors.