Technical Specs

Traffic Air Dispersion Model


This product is a Microsoft Windows-based program that can be installed in the following Windows operating systems:

  • 32-bit and 64-bit Operating Systems
  • Windows 10

Minimum requirements:

  • An Intel Pentium 4 processor (or equivalent) or higher
  • At least 2 GB of available hard disk space
  • 1 GB of RAM (2 GB recommended)


Developed by the California Department of Transportation and the U.S. Environmental Protection Agency, the CALINE series of models are steady-state Gaussian plume models specifically designed to calculate air quality impacts from vehicle emissions.

Models CO, PM, Inert GasesXXX
Models NO2As Inert GasXAs Inert Gas
Unlimited ReceptorsXX
4 Roadway Types (At-Grade, Depressed, Fill, Bridge)XXX
Intersections & Queuing LinksXXX
Street Canyons & BluffsX
Parking LotsX
Surface Roughness ConsiderationsXXX
Process Multiple Meteorological ConditionsXX
Process Up to 1 Year of Actual Meteorological DataX
Urban or Rural Dispersion ModesX
Multi-Tier Hourly-Varying EmissionsX