railroad grade crossing; on-track equipment

SB 1074 amends Arizona's railroad crossing safety laws to clarify when drivers must stop and how they should proceed. It requires all drivers to stop within 15-50 feet of tracks when signals, gates, or approaching trains are present, and specifies conditions under which drivers may cautiously cross after stopping (e.g., clear sightlines with no approaching trains). The bill adds specific rules for school buses, commercial vehicles (requiring safe gear selection and space clearance), and heavy equipment (mandating advance notice to railroads and visual checks before crossing). These changes directly affect drivers of all vehicles, commercial operators, school bus drivers, and those moving heavy machinery near railroad crossings.