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E-4 ( Example of Roadway Geometry ) 109 illustrates example roadway geometry for a two-way intersection (units in feet). 

## E.2.6.2 Traffic Data 

Typically, total traffic volumes, turning movements, saturation flow rates, tota signal length, control type, red/yellow/green time are d etailed in Highway Capacity Model (HCM’s) SYNCHRO traffic data reports . Th is information is required for each scenario (e.g., existing, no-build, and build), time period (e.g., AM and PM peak hours) and analysis year(s). This will allow the air quality analyst to accurately represent all free-flow and turning lane geometry f or the CAL3QHC and/or CAL3Q dispersion model. For PM, hourly traffic data is neccessary. 

## E.2.6.3 Meteorological Data 

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Local meteorological conditions must be specified when conducting a hot -spot analysis. The typical inputs into CAL3QHC are summarized in Table E-6 ( Typical Meteorological Inputs ). However, site-specific data for these parameters supersedes any default value. 

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Source: EPA, Addendum to The User's Guide to CAL3QHCR Version 2.0 (CAL3QHCR User's Guide) by Peter A. Eckhoff and Thomas N. Braverman, September 1995, http://www.epa.gov/scram001/userg/regmod/cal3qhcrug.pdf. 

