Aldridge's experience with track allocations, DAS knowledge and a familiarity with the existing systems resulted in winning the Prime Contractor role for this project. The 4G Next Generation Distributed Antenna System (NG-DAS) was developed, designed and installed throughout the project owner's 22 miles of rapid transit subway tunnels. Crews also removed the legacy two-way radio system and deactivated/removed the First Generation Distributed Antenna System (FG-DAS) originally installed by Aldridge in 2005.