United States Department of Transportation
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Abstract:The Federal Transit Administration (FTA) Office of Planning and Environment (TPE) tasked the Volpe Center to develop guidance for transit planners, in order to address persisting public health and safety concerns with prolonged EMF environmental exposures from all sources, including transit. The guidance provides technology and operational options to prevent and mitigate EMF/EMR public exposures from electric transit systems traction power supply (TPS) infrastructure, vehicles and operations, and from emerging Intelligent Transportation Systems (ITS) for communication, navigation and control. Current efforts to expand energy efficient electric transit in US cities, and environmental streamlining offer opportunities to design and site the traction power supply substations (TPSS) that power the third rail or the Overhead Catenary System (OCS) so as to minimize public exposures. Similarly, the electric power and propulsion equipment on-board transit vehicles can be designed to prevent or mitigate passengers and workers EMF exposures, so to ensure their health and safety. The Guidance discusses the transit sources of EMF/EMR, and data for commonly encountered environmental levels of electric and magnetic fields for light and heavy rail urban transit. Transit EMF emissions and exposures are compared with other common environmental exposures, and to existing national and international environmental safety and health EMF/EMR standards and regulations protecting the public and sensitive population segments. Modeling, measurement, and design tools, as well as Best Practices for transit power supply infrastructure, facilities and operations related to EMF/EMR prevention, mitigation and compliance assurance are discussed and referenced in the Guidance.
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