b.m. equipment onboard the locomotive both. by relying on physiological signs and set of visual clues the bracelet system detects. potential danger in the conductor's condition early when this is to understand that the driver is too tired showing signs of getting sleepy initiates a little tests and exercises to keep him or her alert thanks to their advanced system of monitoring physical sites not a single incident has occurred as a result of an operator not being alert enough a feat which required a bit of tricky engineering. motion artefacts which can interfere in the measurement of resistance as well as temperature and other factors you should really do resistance much stronger. signal now the real brains behind the whole system is this big box of controllers and wires back out and you catherine burke this one is about to be installed in one of his freight trains developed by the us and assembled under the supervision of south it's responsible for coordinating all data in the system with still some suppliers to ensure quality