1991-08-01

California's Heavy-Duty Vehicle Smoke and Tampering Inspection Program 911669

ABSTRACT

Emissions from heavy-duty vehicles are a major contributor to California's air quality problems. Emissions from these vehicles account for approximately 30% of the nitrogen oxide and 75% of the particulate matter emissions from the entire on-road vehicle fleet. Additionally, excessive exhaust smoke from in-use heavy-duty diesel vehicles is a target of numerous public complaints. In response to these concerns, California has adopted an in-use Heavy-Duty Vehicle Smoke and Tampering Inspection Program (HDVIP) designed to significantly reduce emissions from these vehicles. Pending promulgation of HDVIP regulations, vehicles falling prescribed test procedures and emission standards will be issued citations. These citations mandate expedient repair of the vehicle and carry civil penalties ranging from $300 to $1800. Failure to clear citations can result in the vehicle being removed from service. It is projected that this program will reduce nitrogen oxide, hydrocarbon and particulate matter emissions from these vehicles by 19, 22 and 32 tons per day respectively at a cost effectiveness ranging from $0.44 to $0.47 per pound reduced.

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