This document proposes expanding track at the Industrial Wye in Proviso, Illinois to accommodate longer trains. It provides details on existing track lengths that can currently accommodate 24 cars or 30 cars. The document recommends installing a switch and frog to add approximately 1,000 feet of new track between mile markers 6.0 and 6.36 to allow run arounds of trains with more than 24 cars. A map is included showing the proposed location of the new track and connections to existing track. Safety is emphasized as the top priority for the proposed expansion.