Metro B2R Geotechnical Design Report Summary

This is a geotechnical design report prepared for the Los Angeles Metropolitan Transportation Authority (Metro) supporting the Brighton to Roxford Double Track (B2RDT) Project, specifically related to Segment 4 grade crossing improvements at Polk Street in California. The report provides geotechnical engineering analysis and design recommendations necessary for the at-grade crossing safety improvement work at the Polk Street location. This design deliverable supports Metro's pre-construction phase activities as part of the broader B2RDT Project, which has been segmented into four distinct phases to optimize project delivery along the Antelope Valley Line corridor. The geotechnical investigation and resulting design specifications form part of the Plans, Specifications, and Estimates (PS & E) required to advance the Polk Street crossing project into construction.

The geotechnical design report contains subsurface investigation data, soil and geological analysis, and engineering design recommendations specific to the Polk Street at-grade crossing location. This technical documentation serves as a foundation for construction planning and procurement activities related to the grade crossing safety improvements. The report enables Metro to proceed with the pre-construction phase for this priority safety improvement project while other segments of the B2RDT Project continue through their respective development phases. The geotechnical information provided in this report is critical for contractors and engineers to accurately estimate costs, develop construction methodologies, and ensure compliance with applicable design standards for railroad grade crossing improvements.