regulation of train horns
The federal regulation concerning train horns is officially known as the FRAâs Final Rule on the Use of Locomotive Horns at Highway/Rail Grade Crossings and became effective June 24, 2005. Union Pacific believes quiet zones compromise the safety of railroad employees, customers, and the general public.
Train horns must be sounded in a standardized pattern of 2 long, 1 short and 1 long blasts. The pattern must be repeated or prolonged until the lead locomotive or lead cab car occupies the grade crossing. The rule does not stipulate the durations of long and short blasts.