49 CFR §214.333

1. (a)A railroad is permitted to include informational line-ups of trains in its on-track safety program for use only on subdivisions of that railroad upon which such procedure was in effect on March 14, 1996.
2. (b)Each procedure for the use of informational line-ups of trains found in an on-track safety program shall include all provisions necessary to protect roadway workers using the procedure against being struck by trains or other on-track equipment.
3. (c)Each on-track safety program that provides for the use of informational line-ups shall discontinue such use by June 12, 2017.