ROADS - · PDF fileHighway design Site selection ROADS for Modeling ... Most mobile source...
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ROADS BREEZE ® ROADS is a complete mobile source modeling package including CAL3QHC, CAL3QHCR, and CALINE4. This suite is used to predict air quality impacts of carbon monoxide (CO), nitrogen dioxide (NO 2 ), particulate matter (PM), and other inert pollutants from moving and idling motor vehicles at or alongside roadways and roadway intersections. BREEZE ROADS can be used in conjunction with the MOBILE5 and MOBILE6 (or EMFAC in California) emissions model and other 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 vehicles traveling under free-flow conditions. However, ROADS is an enhanced version of the CAL3QHCR, CALINE4, and CAL3QHC series of models that incorporates methods for estimating queue lengths and the contribution of emissions from idling vehicles. Because idling emissions account for a substantial portion of total emissions at an intersection, this capability represents a significant 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 required by transportation models (e.g., roadway geometries, receptor locations, meteorological conditions, and vehicular emission rates). ROADS can process existing BREEZE CAL3QHCR and CALINE4 input files. Emission factors should be obtained from an accepted mobile source emission factor model such as MOBILE5 or MOBILE6. ROADS also includes BREEZE GRAPHICS which provides a seamless interface between ROADS and Surfer ® software. GRAPHICS is integrated with ROADS to create report quality 2-D and 3-D graphics. Advanced Intersection Modeling Additional requirements of ROADS include idling emission rates and the number of “moving lanes” approaching each intersection. ROADS includes three options for more precise specification of the 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 the Transportation Research Board’s 1985 Highway Capacity Manual. Based on these values, an emission source strength is calculated and then converted to a line source value so the model can process it as a nominal free-flow link. View multiple screens using BREEZE ROADS.
Transcript of ROADS - · PDF fileHighway design Site selection ROADS for Modeling ... Most mobile source...
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
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.
