49 CFR §236.601
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Signals controlled by devices used to provide protection against unusual contingencies, such as landslides, dragging equipment, burned bridges or trestles and washouts shall be located so that stopping distance will be provided between the signal and the point where it is necessary to stop the train.