A Line Source Model, Created In Research Center of Ecological Physical Science, Personnel of Science at Qena, Egypt Is Proposed to Depict the Downwind Scattering of Poisons Close to Streets, at Various Urban Areas In Egypt. the Model Depends on the Gaussian Crest Procedure and Is Utilized to Anticipate Air Contaminations' Focuses Close to Streets. Toward This Path, Straightforward Programming Has Been Introduced In This Paper, Created By Creators, Received Totally Graphical User Interface (Gui) Procedure For Working In Different Windows-Based Microcomputers. the Product Interface and Code Have Been Planned By Microsoft Visual Fundamental 6.0 Dependent on the Gaussian Dispersion Condition. This Product Is Created to Foresee Convergences of Vaporous Poisons (Eg. Co, So2, No2 and Particulates) at a Client Determined Receptor Matrix.