As a subcontractor to Transit Services America (TASI), DMZ is to transpose the left rail and right rail at a total of eight curves on two Caltrain mainline tracks near the Caltrain Equipment, Maintenance, Operations Facility (CEMOF). Work includes; transposing the rail, replacement of insulated rail joint plugs, destressing of the rail, thermite welding, and replacement of concrete tie components (Fastclips, rail seat pads, & insulators.)