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Project at a Glance

Project Status: complete

Report Published December 1988:

Title: Study of excess motor vehicle emissions - causes and control

Contractor: Sierra Research, Inc. and Radian Corporation

Contract Number: A5-188-32

Research Program Area: Emissions Monitoring & Control

Topic Areas: Mobile Sources & Fuels


This report presents the results of a major research study addressing the causes of excess emissions from California vehicles. The effort produced ten separate reports. This volume contains the first five reports produced under the contract. They are:

I. Heavy-Duty Diesel NOx and Particulate Control Technologies
II. Enforcement Alternatives for Heavy-Duty Engine Emission Standards
III. The Feasibility of a Heavy-Duty Gasoline Truck Inspection and Maintenance Program
IV. Evaluation of "Expert Systems" and Test Analyzer System Enhancements for the California Smog Check Program
V. Evaluation of Factors Affecting Catalyst Durability In Light-Duty Vehicles

The remainder of the reports produced under this contract are contained in Volume II. For an overview of all of the work produced under the contract, the reader is referred to:

Executive Summary of Work Produced Under ARB Contract "A Study of Excess Emissions - Causes and Control," December 1988.


For questions regarding this research project, including available data and progress status, contact: Heather Choi at (916) 322-3893

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