Siemens S700

Siemens S700
Han Zheng · CC BY-SA 2.0 · source
Name	Siemens S700
Manufacturer	Siemens Mobility
Family	S700/S700L
Formation	2–4 cars
Gauge	Standard gauge

Siemens S700 The Siemens S700 is a low-floor light rail vehicle manufactured by Siemens Mobility for modern streetcar and light rail transit systems in the United States and elsewhere. It succeeds earlier Siemens models produced by Siemens divisions and competes with rolling stock from Bombardier Transportation, Alstom, CAF and Brookville Equipment Corporation. The S700 integrates modular rail vehicle technologies, contemporary ADA-compliant accessibility, and established propulsion systems to meet requirements of agencies such as Los Angeles County Metropolitan Transportation Authority, New Jersey Transit, and Sound Transit.

Design and Development

Siemens designed the S700 as a development of the S70/S70L family produced at facilities in Florin, California and Sacramento, California, leveraging engineering teams with prior projects for San Francisco Municipal Railway and Port Authority of Allegheny County. Early design priorities included a fully low-floor interior for step-free boarding to comply with Americans with Disabilities Act of 1990 standards, increased energy efficiency reflecting lessons from California Air Resources Board guidance, and improved crashworthiness aligned with Federal Transit Administration criteria. The vehicle architecture drew on modular carbody construction techniques pioneered by Siemens-Duewag and later iterations applied in collaborations with New Flyer Industries and Siemens Transportation Systems. Prototype testing involved track trials coordinated with agencies in Sacramento and regulatory oversight by FRA-equivalent local authorities.

Technical Specifications

The S700 is offered in single-section and articulated multiple-unit formations using stainless steel or aluminum carbody construction similar to preceding models built for Portland (Oregon), Seattle and Charlotte, North Carolina. Typical specifications include a nominal maximum speed suited to urban operations, low-floor heights around 14 inches for level boarding compatible with platforms used by Metro Transit (Minnesota), traction motors using IGBT or SiC-based inverters influenced by power electronics advances in the electric vehicle industry, and regenerative braking systems employed in fleets operated by Los Angeles Metro. The electrical systems interface with 600–750 V DC overhead lines as specified by operators such as Valley Metro and MBTA. Bogie design incorporates independently rotating wheels akin to technology used by Siemens Mobility on regional multiple units, while onboard systems support passenger information from vendors used by Washington Metro and HVAC units sized for climate conditions found in Phoenix, Arizona and Houston, Texas.

Variants and Configurations

Siemens markets the S700 in multiple configurations: two-car and three-car articulated sets, LRVs with operator cabs at both ends for reversible service as used by Sound Transit and single-ended variants for loop termini common in San Diego MTS operations. Interior layouts vary to provide longitudinal seating, priority seating areas consistent with policies from Metropolitan Transportation Authority (New York), and bicycle racks reflecting ordinances in Portland (Oregon). Door arrangements and platform interface options are tailored for level boarding systems like those in Dallas Area Rapid Transit and legacy high-platform systems found in parts of New Jersey Transit infrastructure. Optional freight-compatible couplers and multiple-unit control systems allow integration into mixed fleets similar to practices at MBTA and Pittsburgh Regional Transit.

Operational History

Since introduction, S700 vehicles entered service on networks undergoing modernization and expansion projects funded or overseen by agencies such as Los Angeles County Metropolitan Transportation Authority, Sound Transit, and Metropolitan Transit Authority of Harris County. Early deployments focused on replacing aging heritage fleets and meeting capacity growth driven by transit-oriented development near Union Station (Los Angeles) and King Street Station (Seattle). Operational data from agencies operating the platform informed iterative refinements in software control, diagnostics, and passenger amenities reflecting feedback channels used by Metropolitan Transportation Authority (New York) and Chicago Transit Authority. Incidents and service disruptions involving light rail vehicles prompted coordination with regional safety boards like the National Transportation Safety Board for investigations and recommended modifications.

Deployment and Operators

Operators procuring S700 vehicles include municipal and regional authorities such as Los Angeles County Metropolitan Transportation Authority, Sound Transit, Valley Metro, and other U.S. agencies managing light rail networks in Phoenix, Salt Lake City, and Charlotte. International interest and export discussions invoked partners and standards in Mexico City, Toronto Transit Commission, and select European cities familiar with Siemens fleets like Berlin. Fleet delivery schedules and commissioning typically coordinate with local infrastructure projects funded through mechanisms involving Federal Transit Administration grants and municipal bonds issued by counties and cities named above.

Maintenance and Upgrades

Maintenance regimes for S700 fleets follow preventive and predictive strategies used across modern fleets, integrating condition-based monitoring hardware supplied by vendors partnered with Siemens Mobility and software platforms used by Hitachi Rail and Alstom competitors. Over-the-air software updates, modular component replacement, and mid-life refurbishment programs address lifecycle costs comparable to programs run by Metropolitan Transit Authority (New York), MBTA, and Transport for London for analogous rolling stock. Upgrades may include retrofitting SiC inverters, improved passenger information systems compatible with General Transit Feed Specification feeds, and interior modifications for evolving accessibility standards influenced by rulings and guidance from entities like U.S. Access Board.

Category:Light rail vehicles