49 CFR § 214.347 - Training and qualification for lone workers.
Each lone worker shall be trained and qualified by the employer to establish on-track safety in accordance with the requirements of this section, and must be authorized to do so by the railroad that conducts train operations on those tracks.
(a) The training and qualification for lone workers shall include, as a minimum, consideration of the following factors:
(1) Detection of approaching trains and prompt movement to a place of safety upon their approach.
(2) Determination of the distance along the track at which trains must be visible in order to provide the prescribed warning time.
The following state regulations pages link to this page.