Ten miles of underground neutral-host DAS — installed from rail trucks in off-hours without disrupting service to 48,000 daily commuters.
Project install included Radiating Coax, Fiber, Distributed Antenna System, and Wireless Infrastructure in the SFMTA tunnels to support a neutral host environment for all major cellular carriers. The total distance of underground work was just under 10 miles. Installation was performed in municipal tunnels on rail trucks in off hours to avoid disruption of weekday commuter service to 48,000 daily passengers, community street fairs, big sports events, and other street festivals.
Radiating Coax & Fiber — Radiating coaxial cable feeders and fiber backbone deployed the full length of the tunnel system — mile after mile of confined-space pulls, terminations, and labeling underground.
Distributed Antenna System — DAS infrastructure tuned for the tunnel’s RF environment — antenna placement engineered for handoff continuity and supporting a neutral-host headend serving every major US carrier.
Night Sequencing — Every shift loaded onto rail trucks and worked the tunnels overnight — sequenced against street fairs, Giants games, Warriors games, and community festivals above ground. Commuter service was never interrupted.
Acceptance Testing — Coverage walks with full-band testers, neutral-host onboarding for each carrier, and as-built records for the operator and the FCC filing.
When you contact Walker Telecomm, you reach a certified senior engineer — not a gatekeeper. Tell us about the program; we'll come back with a scoped response, not a brochure.