A Procedure for Estimating the Frequency Distribution of CO Levels in the Micro-region of a Highway

Report No: 79-R53

Published in 1979

About the report:

This report demonstrates that the probability of violating a "not to be exceeded more than once per year", one-hour air quality standard can be bounded from above. This result represents a significant improvement over previous methods of ascertaining the impacts of pollution sources. Such methods essentially estimated the expected annual maximum concentration and then compared the estimate to that concentration "not to be exceeded more than once per year". The probabilistic method presented in this report is easy to use, inexpensive to implement, and it directly addresses the question of the likelihood of violating an air quality standard. Furthermore, employment of this probabilistic method eliminates the need for the subjective inputs and the subjective analyses of results which characterize the so-called "worst case" methods of determining air quality impact.

Disclaimer Statement:The contents of this report reflect the views of the author(s), who is responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Any inclusion of manufacturer names, trade names, or trademarks is for identification purposes only and is not to be considered an endorsement.


Other Authors

William A. Carpenter

Last updated: January 26, 2024

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