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Bay Area Rapid Transit System

The Bay Area Rapid Transit District (BART) is a rapid transit rail system which provides service to passengers in San Francisco, Contra Costa, and Alameda Counties. The system includes 34 passenger stations and approximately 75 miles of double track.

HSQ Technology has worked extensively with BART on its new expansion projects. This included designing and installing a Station Communications and SCADA System to support both the existing BART System, as well as the new BART System facilities.

BART Sequential Occupancy Release System (SORS)

HSQ installed and provided startup and testing of replacement SORS equipment. HSQ also removed the existing SORS equipment (25 years old) at 17 BART District Stations, with an option for 8 additional existing stations. This equipment included new microprocessor based systems which perform all the necessary logical system operations. The replacement equipment is interconnected to the BART ATO and ATP train control system and subsystems.

SCVTA Tasman West Corridor

The Tasman West Light Rail Project is an expansion of the Guadalupe Corridor Light Rail System of Santa Clara County, California. The extension added approximately twenty miles of commuter rail line to the existing tracks. 

HSQ supplied a new Operational Control Center (OCC), new SCADA system, new Public Address system, Station Variable Message boards, maintenance telephones, additional monitoring and control RTUs, and a fiber optic based, state-of-the-art communications system in all new and existing stations.

SCVTA Guadalupe Corridor

The Guadalupe Corridor Project upgrades the equipment of 34 existing Light Rail Stations, adds communication systems to two new stations, and modifies the equipment at the Operations and Control Center (OCC), provided by HSQ as part of the Tasman West Project.

The retrofit work at the 34 existing stations includes replacement of the existing T1 PCM Carrier backbone system with a new fiber optic cable transmission system, and a new OC-3 Synchronous Optical Network (SONET) to provide voice and data communications to the passenger stations and substations. To accomplish this upgrade , approximately 23 miles of single-mode fiber optic cable will be installed in the existing duct banks and the SONET network will be configured in three OC-3 rings.

The existing SCADA and communication equipment at the 34 stations will be removed and replaced with new PLCs, Visual Message Boards, Maintenance Telephones, and Public Address equipment. VTA-supplied Ticket Vending Machines will also be installed at these sites.

At the two new passenger stations, similar equipment will be installed so that all locations have the same capabilities.

To ensure the entire system functions seamlessly, modifications to the head-end equipment, including SCADA software changes, will be made to allow for comprehensive operation.

Staten Island Transit Project

HSQ Technology, as a subcontractor to Halmar Builders, is supplying a SCADA and communications system.

HSQ Technology provided a SONET Network consisting of nine nodes.  The system provides the media for carrying both voice and data from the 22 stations to the control center located at the St. George Substation.  The fiber optic transmission system operates at OC-3 data rate.  Located at each node are sub-rate data cards to interface to the SCADA, RTU and the non-vital logic controllers.  At selected stations, 4w E&M cards are provided to interface to radio receivers and radio repeaters.  Two-wire telephone circuits were provided at wayside locations and within the station to allow access through the public switch telephone network as well as the integrated voice communications system at St. George.

The SCADA System consists of two workstations located at the St. George control center.  One is the operating workstation, and the other is a backup.   Located at each of the substations is a Remote Terminal Unit (RTU) to monitor, control and supervise the DC power system.  In addition to the RTUs at the DC substations, there is one RTU at each 100Hz MA Substation.  The status and conditions of the substations will be graphically displayed via the mimic on the SCADA workstations.

Las Vegas Area Computer Traffic Signal Upgrade

HSQ Technology completed the Las Vegas Area Computer Traffic Signal Upgrade for the Nevada Department of Transportation. The upgraded system allows Las Vegas traffic control personnel to actively monitor traffic at over 40 intersections and highway on/off ramps throughout the greater Las Vegas area. The system also allows remote traffic monitoring at Las Vegas City Hall Traffic Engineering, Clark County Traffic Engineering and local television stations.

The upgrade included installation of over 15 miles of underground copper and fiber cable, installation of over 100 twisted wire video transmission units, testing over 30 miles of existing cable and the system integration; all of which were completed within 4 months.

CALTRAIN, Joint Peninsula Board, San Mateo, CA.

HSQ Technology provided an ADA (Americans with Disabilities Act) Compliance upgrade of seven key stations for CALTRAIN , Joint Peninsula Board, San Mateo, California. This is a commuter rail line.