An Act amending Title 66 (Public Utilities) of the Pennsylvania Consolidated Statutes, in railroads, providing for prohibition on blocking of crossings, for limitation on length of freight or work trains, for authorization to monitor safety practices and operations by collective bargaining representatives, for safe staffing levels for trains or light engines, for wayside detector systems, for study of transportation of hazardous materials or waste, for reporting system for transportation of hazardous materials or waste and for hazard impact assessment; and imposing penalties.

Added a new section requiring rail carriers to submit a Hazard Impact Assessment to the Commission and Department of Transportation before constructing or expanding a railyard if it affects public grade crossing traffic or safety.

Required the assessment to include an analysis of projected traffic volumes and identification of high-risk intersections, such as sight line obstructions or risks of vehicles queuing onto tracks.

Mandated that if high-risk intersections are identified, the railroad must include a mitigation plan detailing physical improvements like four-quadrant gates or grade separations.

Added a specific effective date of 60 days for the new Hazard Impact Assessment section, while the rest of the act remains effective in 180 days.

Updated the list of bill sponsors to include additional representatives and noted that the bill was amended on second consideration.