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CTA 4G Subway Cellular Upgrades Project
Start/Scheduled Date of Completion:
December 2014 - May 2016
SQN's Role on Project:
Construction for the 4G Subway Cellular Upgrades Design/Build project took place in 2015, and provided faster and more reliable voice and data transmission throughout the 22 miles of subway tunnels on the CTA's two most heavily used rail lines, Red and Blue, where approximately 180,000 combined riders pass through on the average weekday. Several major carriers provided the funding for the installation of a Next Generation Distributed Antenna System (NG-DAS) which replaced the existing system and made Chicago the largest U.S. public transit system with 4G coverage in all subway stations and tunnels. The contractor installed over 40 miles of radiating cable throughout the subways and equipment for two separate cellular base stations which send signal via fiber optic cables to 46 total remote sites within the subway system. The new remote NG-DAS equipment then configures the signal for distribution to new radiating coaxial cables and antennas for a portion of the subway tunnel, providing cellular service to the end users.
Total Project Budget:
Project Delivery Method: