Assessing air quality impacts from surface roads

Recognising the contribution of motor vehicles to air pollution, Roads and Maritime Services developed the Tool for Roadside Air Quality (TRAQ). TRAQ assesses the potential air quality impacts and greenhouse gas emissions from vehicles using a new or existing roadway.

TRAQ helps to assess these impacts using a simple, worst-case model. Using TRAQ can identify if detailed modelling is needed to provide a more accurate assessment. A manual is provided, this explains how to use TRAQ, and the assumptions behind it.

TRAQ has been designed for Excel 2003, Excel 2007 or Excel 2010, in a Windows operating system. The air quality assessment component requires CALINE-4 which is available for free download from the Caltrans website.

Tool for Roadside Air Quality (TRAQ) - tool and user manual

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