Abstract

Average speed is an essential input to the air quality analysis model MOBILE6 for emission factor calculation. Traditionally, speed is obtained from travel demand models. However, such models are not usually calibrated to speeds. Furthermore, for rural areas where such models are not available, there has not been a reliable method for estimating speed.

In this study, a procedure was developed based on the Highway Economic Requirement System (HERS) speed model to estimate average speed using as input various data such as roadway characteristics and traffic conditions. This procedure was coded in MS Excel macro and can be attached to a workbook that contains the roadway inventory data in the HPMS format.

The comparison between the measured speeds and those estimated by the model demonstrated the strong performance of the model. The data availability and accuracy issue during the implementation stage was discussed.

Report Date

5-2005

Report Number

KTC-05-07/PL5-03-1F

Digital Object Identifier

http://dx.doi.org/10.13023/KTC.RR.2005.07

Notes

The contents of this report reflect the views of the authors, who are responsible for the facts and accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the University of Kentucky, the Kentucky Transportation Cabinet, nor the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. The inclusion of manufacturer names or trade names is for identification purposes only and are not to be considered as endorsements.

Download

Share

COinS