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ROADS

BREEZE® ROADS is a complete mobile source modeling packageincluding CAL3QHC, CAL3QHCR, and CALINE4. This suite isused to predict air quality impacts of carbon monoxide (CO),nitrogen dioxide (NO2), particulate matter (PM), and other inertpollutants from moving and idling motor vehicles at or alongside roadways and roadway intersections.

BREEZE ROADS can be used in conjunction with the MOBILE5and MOBILE6 (or EMFAC in California) emissions model andother emissions data as a tool to demonstrate compliance with:

■ National Ambient Air Quality Standards (NAAQS)■ Federal Conformity Rules■ U.K.’s National Air Quality Strategy■ U.K.’s Local Air Pollution Control (LAPC) Guidelines

Other applications include:

■ Environmental impact assessment■ Highway design■ Site selection

ROADS for Modeling Roadways and Intersections

Most mobile source dispersion models predict air pollution concentrations near roadways resulting from motor vehiclestraveling under free-flow conditions. However, ROADS is anenhanced version of the CAL3QHCR, CALINE4, and CAL3QHCseries of models that incorporates methods for estimating queuelengths and the contribution of emissions from idling vehicles.

Because idling emissions account for a substantial portion oftotal emissions at an intersection, this capability represents asignificant improvement over other models.

This application is especially designed to handle:

■ Near-saturated and over-capacity traffic conditions■ Traffic and signalization data with up to seven different

patterns■ Hourly meteorological data

The inputs for ROADS include information commonly requiredby transportation models (e.g., roadway geometries, receptorlocations, meteorological conditions, and vehicular emissionrates). ROADS can process existing BREEZE CAL3QHCR andCALINE4 input files. Emission factors should be obtained from anaccepted mobile source emission factor model such as MOBILE5or MOBILE6.

ROADS also includes BREEZE GRAPHICS which provides aseamless interface between ROADS and Surfer® software.GRAPHICS is integrated with ROADS to create report quality 2-Dand 3-D graphics.

Advanced Intersection Modeling

Additional requirements of ROADS include idling emission ratesand the number of “moving lanes” approaching each intersection.ROADS includes three options for more precise specification ofthe operational characteristics of an intersection. These include:

■ Saturation flow rate (number of vehicles per hour, per lane)■ Signal type (pre-timed, actuated, or semi-actuated)■ Arrival type (the rate of vehicle progression for each

queue link)

For queue estimation, the model uses an approach delay equation (rather than a stopped delay) as recommended by theTransportation Research Board’s 1985 Highway CapacityManual. Based on these values, an emission source strength iscalculated and then converted to a line source value so themodel can process it as a nominal free-flow link.

View multiple screens using BREEZE ROADS.

BREEZE is a registered trademark of Trinity Consultants Incorporated.Windows and Windows NT are registered trademarks of MicrosoftCorporation in the United States and/or other countries. Surfer is a registered trademark of Golden Software, Incorporated. Pentium is aregistered trademark of Intel.

Copyright 2003. All rights reserved.

(972) 661-8881 ■ Fax: (972) 385-9203breeze-software.comWorldGeoData.com

breeze@trinityconsultants.com

System Requirements

■ PC with Pentium® processor■ 32 MB RAM or greater■ CD-ROM Drive■ Windows 98SE, 2000, XP, NT®, ME■ Mouse or compatible pointing device ■ VGA monitor■ On Windows NT system, installation of BREEZE

and related software must be performed from an Administrator account

Superior Development Tools

As a Microsoft® Certified Partner, Trinity has early access to Microsoft products, ensuring that Trinity’s software products are compatible with new Microsoft operating systems and

BREEZE ROADS Model Capabilities

applications. The program also supports Trinity’s product development process by providing Microsoft software developmenttools and an enhanced level of Microsoft technical support.