August 1, 2012
Involves releasing non-toxic, inert, odorless gas and particle tracers into the subway system and nearby locations. Particle and gas concentrations will be sampled in more than 20 stations covering the entirety of the underground portion of the MBTA subway system as well as numerous locations in Boston and Cambridge.
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Hazard Analysis: The Practice of Using Cell Phones While Operating a Transit Vehicle Examining system safety principles, available information in the public domain, recent transit incidents and policies.
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