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<br />VEHICLE EMISSIONS INSPECTION AND <br /> <br />NUUNTENANCEPROGRAMS <br /> <br />In an effort to reduce air pollution caused by motor vehicles, many nations are exploring <br />the possibility of testing in-use vehicles for exhaust emissions. Vehicle emissions <br />inspection and maintenance (IIM) programs are designed to identify vehicles that pollute <br />above an acceptable level and require those vehicles to reduce their emissions through <br />maintenance or repairs. <br /> <br />IJM programs have been in operation in the United States since the early 1970s. They <br />have been very effective in reducing hydrocarbon (HC) and carbon monoxide (CO) <br />emissions from vehicles and have been a major contributor to the dramatic air quality <br />improvement in that nation. <br /> <br />There are two major categories of 11M programs: decentralized and centralized. <br />Decentralized programs require motorist to bring their vehicles to a private auto rep~ir <br />garage for inspection. An exhaust gas analyzer samples the vehicle exhaust and <br />compares it against a standard. If the vehicle passes the test, a certificate is issued and <br />the motorist can then license the vehicle. In centralized programs, either the <br />governmental agency or a contractor performs the exhaust test at a facility specifically <br />designed for that purpose. Systems Control (SC) is a company that operates centralized <br />11M programs and also performs quality assurance oversight on decentralized programs. <br />SC has been extremely effective in designing, building, and operating emission <br />inspection systems that minimize inspection time, while accurately testing exhaust <br />emissions. <br />