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Show Plan to study car pollution Guess who's been keeping hundreds of cars in this country coun-try under strict surveillance with a mysterious little black box. No, it's not the CIA, the FBI nor Russia's MVD. It's the SDC. SDC stands for System Development De-velopment Corporation, a California Cal-ifornia research firm which has installed little black boxes in six major urban centers. According to the magazine "Petroleum Today" it is all part of a three-year $12 million pollution research program supported sup-ported by the American Petroleum Pe-troleum Institute, the Automobile Automo-bile Manufacturers Association, and the U.S. Department of Health, Education and Welfare. (HEW is participating on a project-by-project basis). The little black box actually is a device called a tachograph. It's the heart of the system that measures a car's movements move-ments its speed, trip frequency, fre-quency, distance traveled, and number and duration of stops. The purpose is to give SDC researchers re-searchers a better understanding understand-ing of typical driving patterns |