case studies

Positive Train Control

The Southeastern Pennsylvania Transportation Authority (SEPTA) is a regional public transportation agency that serves 3.9 million people in the five counties in and around the Philadelphia, PA area. SEPTA has the sixth-largest U.S. rapid transit system by ridership.

Congress and the Federal Railroad Administration (FRA) have mandated the nationwide implementation of Positive Train Control (PTC) systems designed to prevent train-to-train collisions, over speed derailments and enhance safety. CWA, as a member of the PTC design team, was assigned responsibility for the planning, detailed design and implementation support for the SEPTA PTC communications systems.

CWA's scope included development of the overall PTC communications infrastructure including radio networks, Ground Based Networks (fiber optics, wireless 4GLTE, leased lines & others) network security, network management and construction oversight.

System Wide Fiber Optic Network

The Metro-North Commuter Railroad (MNR) is a suburban commuter rail service run by the Metropolitan Transportation Authority (MTA), a public authority of the State of New York. With an average weekday ridership of 299,000 customers and it is the second-busiest commuter railroad in North America in terms of annual ridership, serving New York, Connecticut and portions of portions of New Jersey.

To accommodate existing and projected corporate voice, data and video communications requirements, CWA designed a system wide hybrid telecommunications network.The system included OC-192/48 SONET, ATM, TDM, HDSL-2, DACSs, Digital Loop Carrier, advanced network management and other widely deployed communications technologies. The network design was based upon a scalable, standards based platform that provided the railroad with a migration path for next generation DWDM systems.

Radio Design Services - Terminal A

The Port Authority of New York and New Jersey contracted to replace the wireless communication networks at Newark Liberty Airport’s Terminal A. The airport is United Airline’s third largest hub, and in 2016 served a record 40 million passengers.

CWA was responsible for the Phase 1 design of all inbuilding radio communication systems including Land Mobile Radio, Cellular/Wireless and Wi-Fi services.

Silverliner V Rail Procurement Train to Wayside Communications

Design/Build Silverliner V Rail Procurement Train to Wayside Communications SEPTA procured a new fleet of EMU commuter rail vehicles, the Silverliner V. These vehicles incorporate several advanced features, such as onboard diagnostics, automatic passenger information systems and revenue generating advertisements that require multiple types of train-to-wayside communications. CWA was the design/build supplier of the wayside communications network.

SFRTA Dispatch Centers and Radio Communications

SFRTA operates 76 miles of double track commuter rail territory on the South Florida Rail Corridor (SFRC) in Broward, Miami-Dade and Palm Beach Counties. The SFRC accommodates Tri-Rail commuter trains, CSX freight and Amtrak.

SFRTA/Tri-Rail issued a design/build contract for a new primary and backup Operations Control Center (OCC/BOCC). CWA performed design/build of field radio and code line systems, providing SFRTA/Tri-Rail with autonomy of operating the SFRC and improving on time performance.

Silver Line Bus Rapid Transit

The Silver Line Bus Rapid Transit System serves commuters across 34 stations surrounding Grand Rapids, MI. Each station features next-bus arrival signage, ticket vending machines, camera surveillance, and emergency phones. As a team member, CWA led the communications design.

Working with the City of Grand Rapids, Kent County, Michigan DOT and other entities, CWA designed a fiber optic network to accommodate CCTV, ticket vending, fare validation, and variable message signs at each of the stations.

GCRTA HealthLine Bus Rapid Transit

Cleveland, OH GCRTA was one of 10 cities selected by the FTA as a pilot for a new transportation concept known as Bus Rapid Transit (BRT). BRT systems combine attractive features of both bus and street running light rail.

The BRT transit-way extends from Public Square in the Cleveland Central Business District to the University Circle hospital district, where the transit vehicles segue from dedicated BRT lanes to curbside operations.

CWA was responsible for the final design, specifications, drawings, construction estimates and bid support for fiber optic communications systems transporting data for variable message signs, CCTV, SCADA and related systems.