This project provides engineering and construction funds to modernize the A-20 Interlocking near Techny Road in Northbrook on the Milwaukee District North Line. The scope of work includes improving two grade crossings (Shermer and Techny Road), modernizing signals, and improving track between the Morton Grove Station and Deerfield Station. Under this project, work may include adding rail, switches, signals, crossovers, and renewal of track and signal circuits and cables. The project will implement a signal control system that is PTC compatible.